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Old 09-20-2003, 03:24 PM
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what was the strongest year 350 stock from gm???

hello..this is my 1st post here..looks like a great place...i am wundering what year and model chevy produced the strongest 350 motor (pre fuel injection) i have a 78 vette block and 82 ta 305heads 1.85 valves...i am starting cheap..i know the heads are crap but they are free so i am gonna try them....the engine is going in an 84 camaro 350 trans and very low posi gears from 82 ta...i can get a 79 350z28 cam kit for $69 ....just wundered if i should look for a different year to get the strongest cam...

thanx in advance

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Old 09-20-2003, 04:05 PM
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Just use GM parts for the big stuff...
Like the block...other than that the aftermarket can supply the parts you need at a cheaper price.
The market is just overflowing with used parts as well.
Figure a horsepower number you want or start with the dollar amount you have to spend.
Do countless hours of research on this here lil' computer for crate engines and used engines and use that as your build basis.
Also go to the search option here at HR.com and look up things like crate engine, engine, chevy engine...etc...etc...etc....
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Old 09-20-2003, 05:51 PM
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Hey, welcome to the site. That is the EXACT same car i have, check my album. I put a 350 in mine. and MAN does it run strong. Ill look on the net a bit, but try doing a search on yahoo for like chevy 350 specs or something. If you need any help with the car, msg me, can you take any pics?

You know i havnt heard much about them, but there is a really check crate 350 out no buy goodwrench, its got 260 hp and like 350 lbs-ft , for a cheap price for a crate motor. here is a link http://www.jegs.com/cgi-bin/ncommerc...71&prmenbr=361

Last edited by Rubberman2003; 09-20-2003 at 05:51 PM.
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Old 09-20-2003, 09:42 PM
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i have a 79 z28 the cam is garbage if you want quick car you should just buy a crane saturday night special cam kit
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Old 09-20-2003, 09:45 PM
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thanks alot i ll stay away from the stock cams and get a performance cam just gotta take it slower (funds)
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Old 09-20-2003, 09:50 PM
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You can not use the 305 heads on your 350. You can.. but you will not run pump gas. You need new heads.

I can`t believe this was not mentioned.
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Old 09-20-2003, 09:53 PM
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i thought compression would be about 10:1
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Old 09-20-2003, 10:04 PM
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Hey Joeboxer.
I believe that with flat top pistons and your heads(58cc I think) you will get around 10.5-10.8 comp ratio. You may get by with it if you use like 94 octane gas and watch your timming.
I know from experience that when your short of funds and bitten by the hot rod craze that you try and hurry and skimp a little to get things done, but slow down and get decent parts and match em up and you'll be much happier in the end and your car will run much better. Good luck, HG
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Old 09-21-2003, 09:45 AM
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Chevy produced a 370hp/380tq 350 in 1969-70. I believe compression was 11.1 not sure of cam specs
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Old 09-21-2003, 03:47 PM
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I pulled a set of 305 heads out of a grand prix and was considering using them on a 350, I think the heads you have are the same as mine and have 64cc combustion chambers. Look up the part casting number (under the valve cover) and search for your heads on nastyz28.com and find out for sure. I ran the numbers on desktop dyno and it gave me a compression under 10:1, so you should be able to run it on pump gas.

As far as the cam goes, Ive heard quite a few good things about Summit Racing cam #1103 for mild street applications. I bought one to put into my 350, I'll let ya know how I like it. It cost about $75 and that included the cam, lifters, and assembly lube. Seeing as how the lifters would have cost $56 alone if bought seperatly, it's a really good deal. I think the Saturday Night Special cam would be too aggressive for a daily driver.
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Old 12-15-2003, 10:30 AM
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I think that a 1972 350 is the best year for that engine. That is what I have in my 48 Suburban. It runs strong without any noises. It has never been taken apart.
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Old 12-15-2003, 12:11 PM
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Welcome, Joe Boxer...where u at in va man? As for your questions, a 70-71 350 lt1 was I think the strongest year in any of the cars, but I could be wrong. I know these engines came in Z28's those years and were supposed to make around 360hp at the crank...I THINK you will be okay with compression with the 305 heads. As said before, watch timing and octane rating...Realize that with these heads, you'll have good torque due to smaller valve size, but you will run out of air in the top end. So make sure you get a cam with an rpm range that fits it. I.E. you do not want a cam that makes power from 2800-up if your heads are gonna run outta flow around 4500 or so(est.). So just keep these things in mind and if you wanted, you could just build a torque crazy motor with a truck cam or something and roast tires all day long until you get a better set of heads. Again, welcome to the site and I hope I helped without confusing you too much (I am still learning too)...

Ben
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Old 12-15-2003, 01:37 PM
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70 was the best year for anything. the 72 had a compression drop to 8.5. i am pretty sure. my motor was rated at only 200 hp. there was 255 hp 350 that year. i am also pretty sure it had a solid lifter cam tho. all figures are down from 71. i also am pretty sure (AS IN DONT KNOW!) that the comp. drop was from dished pistons.. the tpi engines are okay i guess as far as blocks just junk the tpi. 305 heads will work on your 350 but i would go with the c.r.'s posted as i dont know. i DO know that i had 305 heads on my 327 last year and it ran great on regular, so i dont see why it would be any different with a 350. if it has a 64cc chamber it has a 64cc chamber. a 350 with flat tops and a 76 cc chamber gives you 9.2 to one so it would be a pretty good bump up from that.

Last edited by bullheimer; 12-15-2003 at 02:13 PM.
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Old 12-15-2003, 02:03 PM
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I ran '86 305 heads on an earlier 350/.030 motor with a Crane RV cam in my pickup, and it ran fine. Not a barn burner but reliable and ran it on regular low octane pump gas. I ran the heads only because I had to pass emissions and didn't want to raise any eyebrows. To top it off, one IM station wouldn't test because the engine was clean and not covered in crud! Go figure.
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Old 12-15-2003, 02:46 PM
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To answer the original question, the highest rated pre-FI 350 Chevy engine was the 1970 Corevette 350 LT-1, rated at 370HP, 380 lbs-ft torque. The same engine was used in the same year in the Z-28, but was rated at 360 HP so the Corvette crowd wouldn't have something to ***** about.

I have the same basic engine with 9.5:1 instead of 11:1 compression.
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