1969 350 Chevy Cam Lobe Specs. - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-04-2011, 10:19 AM
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1969 350 Chevy Cam Lobe Specs.

Hi,

Does anybody know the cam lobe height of a 1969 350 casting #3970010? I'm currently rebuilding one for my 1984 GMC Stepside. I would hate to buy a new cam if I don't need one.





Thanks.

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Old 07-04-2011, 10:43 AM
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I think Elgin has a list of replacement cams and specs for that motor. But as cheap as a flat tappet cam is for a Chevy small block, why not get a new cam and lifter set since you have the engine apart?
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Old 07-04-2011, 10:44 AM
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Depends on what cam was in it, the block casting has nothing to do with the cam lobe.
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Old 07-04-2011, 11:04 AM
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Thanks. The cam is stock for the engine, so I thought the casting # would help. A new stock cam from Oreilly's is $49, but it would be a waste of money if the one I have is still good. The engine came with the stock 300 HP heads, so I'm going to run everything stock. After 1969 every new 350 came out lighter with ever decreasing HP. The engine I have is one of the very few that will give me plenty of HP (375) without adding any high performance parts.


Thanks.
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Old 07-04-2011, 11:44 AM
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Then it came with the 300 horsepower 327 cam, which found it`s way into alot of engines. It was even used in the stock 307.
The specs are:
3896929 Hyd. - 195/202 - .390/.410 - 112 - 327 300 HP
You want to reuse the factory cam then the lifters must ride on the exact same lobe they came off of. I myself wouldn`t use this cam when I could spend 90 bucks and have a new summit racing cam with new lifters. The cam I mentioned above was rated at 300 horsepower in gross figures and the 300 horse 350 was really putting out about 240 horses. If you go the new cam route use the summit cam that has the same specs as the edelbrock performer which is 204/214 duration @ .050 and .420 In. .442 exhaust. This cam will give you a smooth idle, better throttle response, better mileage and low end torque.
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Old 07-04-2011, 12:09 PM
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Quote:
Originally Posted by DoubleVision
Then it came with the 300 horsepower 327 cam, which found it`s way into alot of engines. It was even used in the stock 307.
The specs are:
3896929 Hyd. - 195/202 - .390/.410 - 112 - 327 300 HP
You want to reuse the factory cam then the lifters must ride on the exact same lobe they came off of. I myself wouldn`t use this cam when I could spend 90 bucks and have a new summit racing cam with new lifters. The cam I mentioned above was rated at 300 horsepower in gross figures and the 300 horse 350 was really putting out about 240 horses. If you go the new cam route use the summit cam that has the same specs as the edelbrock performer which is 204/214 duration @ .050 and .420 In. .442 exhaust. This cam will give you a smooth idle, better throttle response, better mileage and low end torque.
+1 to DV.

Folks at the factories were more than a little dishonest with the power ratings of their engines, especially back in the day.
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Old 07-04-2011, 03:10 PM
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Quote:
Originally Posted by DoubleVision
Then it came with the 300 horsepower 327 cam, which found it`s way into alot of engines. It was even used in the stock 307.
The specs are:
3896929 Hyd. - 195/202 - .390/.410 - 112 - 327 300 HP
You want to reuse the factory cam then the lifters must ride on the exact same lobe they came off of. I myself wouldn`t use this cam when I could spend 90 bucks and have a new summit racing cam with new lifters. The cam I mentioned above was rated at 300 horsepower in gross figures and the 300 horse 350 was really putting out about 240 horses. If you go the new cam route use the summit cam that has the same specs as the edelbrock performer which is 204/214 duration @ .050 and .420 In. .442 exhaust. This cam will give you a smooth idle, better throttle response, better mileage and low end torque.
Thanks. The engine was apart when I bought it, so there is no way of knowing which lifter is which. I'll look around for a kit.
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Old 07-04-2011, 04:01 PM
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Love your step side. I looked high and low for one and never found one. Summit racing carries the cheapest cam kits you can get, cam and lifters for about $90.
I wanted a step side with the body like yours.
My idea was to lower it 4 inches rear, 2 inches front, slap chrome wheels with 50 series low profile rubber that tucked in under the fender wells.
From the rear it gives that tubbed look. I found several over the years in really nice shape, but they were asking too much for them. Finally I ended up with a 92 chevy Sport side standard cab. I`ve come a long way with it and still have a ways to go with it but it`s a work in progress.
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Old 07-04-2011, 04:42 PM
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I've been seeing a few step sides on craigslist lately in my area. I found mine at the salvage yard; No motor,exhaust,rotted out bed wood,and in bad need of a paint job, but I knew the truck had potential and you can now see what it's turned into. I need a new bumper with a chrome brush guard now.

Here is the bed after I restored it.



And here is the interior including custom seats, grant steering wheel, and 8 ball shifter knob.



Does anybody have a link to the cam kit your referring to?


Thanks in advance.

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Old 07-04-2011, 05:44 PM
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They`ve moved the price up to $102, but it`s still the best deal you`ll find.
Your bed looks really nice. How did you get a junkyard to sell you the truck? All the junkyards around here won`t sell the whole car. I found a really nice 87 cutless supreme 2 door in the junkyard with a knocking 307 olds engine. The rest of the car was in almost perfect shape. Center console, bucket seats, moon roof, nice blue paint. I was almost to the point of begging the guy to sell me the whole car and he wouldn`t do it. He said "I`ll make way more money parting it out than selling the whole thing" But that`s just about my luck right there. I find something that`s a jewel and it`s not for sale. When I got plenty of cash on hand I can`t find anything that I`m looking for. When I`m broke it`s everywhere. I swear I got a little grimlin that follows me around everywhere I go and does his best to crush my hopes and plans. So far he`s done a rather good job of it.
Anyways here`s the link:
http://www.summitracing.com/parts/SUM-K1102/
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Old 07-04-2011, 08:42 PM
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Been out of town for the day since posting last but I'll give the 1102 cam my vote too. It works, period. 305's really respond well to it as well.
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Old 07-05-2011, 05:39 PM
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I brought my calipers home from work today and the ridge measured 4.000 and actually .001 under in a couple of places. I don't know how thick the ridge is. I rented a ridge reamer from oreilly's and it was a POS . I'll likely buy some coarser stones for my hone and hone it off. It doesn't appear to be more than a few thousandths, but it's impossible to tell for sure without measuring.
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Old 07-05-2011, 06:02 PM
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You probably have 041 heads which are a nice performance head from the factory. I know, I run them now. Go have them pocket ported if you can afford it. It will wake them up.

That cam is pretty mild. Very hard to hit 375 horses with that. Get a cam with duration in the low-mid 220's at .050 and around .470-.480 lift. Some nice headers, decent manifold, and properly tuned 4 bbl should have you right around the 375-380 hp mark.

Really like the truck, especially that diamond tuck looking interior and the fine job you did on the bed. Stepsides are way cool.
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Old 07-05-2011, 07:59 PM
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Thanks everybody. I'll keep you all updated on the build and post some pics as I go along. We're scheduled for 50 hrs. a week at work for the next four weeks, so I'll have some money to pour into it.
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Old 07-08-2011, 08:23 PM
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Has anybody ever taken their block to the shop and had them replace camshaft bearings? None of the part stores in my area rent the pullers. I was wondering if the shop could replace them for the price of the puller. I went to Fayetteville Motor Exchange today and got a new piston to replace the one with a broken skirt for $22 and he even pressed it on for me.


Cheers.
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