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Strick 07-01-2002 10:40 AM

Hop up 307 or 327/350
I am curious the opinions from others on this.
I have a '36 1ord P/U street Rod. It has a 307/350turbo. The engine has headman headers and an Edlebrock Carb with Performer manifold. With 11" rear tires the engine is not even powerful enough to break them loose at a stop sign. I am guessing the Ford 8" rear end is a 2.80 or 3.00 ratio.

Here is my dilemma. Yanking the motor is a lot of work (right now). I am having an additional garage/shop built soon, so a motor R & R then will not be an issue like it is now. I am thinking about finding a set of Fuelie heads to put on the 307, and a nitrous set-up. These of course can be bolted on to any small block I eventually put in the car. I am looking for more performance now (the easiest way). Am I being stupid here, and just wait for a 327 or 350, or should I go ahead with the heads/nitrous?

Here in Reno we have an Event every August called - Hot August Nights. There is a lot of different activities for the 5000 registered cars. One of the events is drag racing which I would love to do, but not with the 307 the way it is!

Thanks in advance for your responses!

oldcarguy85 07-01-2002 08:37 PM

307 is a great motor. I would just change the rear gears to something a little taller, maybe 3.50. anyway basically anythng u colt onto teh 307 now can be put on anothe rsmall block later. so i would change rear gears, then start bolting stuff on, then if u stil feel its neccessary later on, put in a larger displacement motor.

307 is a great motor though, and its something differnet, not jsut another 350

Swishy 07-01-2002 10:55 PM

Why not go the whole hog ....bore the 307 out to the max (as close to over square as poss)...4 bolt mains conversion tougher rods etc ..not much better than an 8 at 8000+ grand and it would give the ol 350's a good run.... :D

mmetalman 07-01-2002 10:58 PM

When I was in hihgscool in the late seventies, the 307 did not have the same reputation as the other s/b chevs. They were considered to have less power than the 283 and people bored them out alot. So I would say don't waste the heads on that motor unless you expect to trash it for fun. I don't think the 307 was available in 4bolt main form, or even factory 4bbl. The nitrous may be fun to use on it tho, lol. Good luck either way.

circlehill 07-02-2002 07:51 AM

Don't waste your money on this engine. Go ahead and get a 350 with the money. The 307 is a good engine to ride around with but it will cost more to get it to the HP of the stock 350 than the 350 will cost and then the engine may not be reliable.

4 Jaw Chuck 07-02-2002 08:17 AM

Torque is what moves the car, make the most of what you have for now by getting some gears for it. Multiplying is always easier than adding and the gears are an afternoon swap, you will need them for your next motor anyway.

Try some 3.73 gears you might not want/need the 350 afterwards.

huffed6 07-02-2002 01:27 PM

i agree with 4jaw chuck put gears in rear min 3.73 ratio will wake that puppy right up.depending on rear tire circumfrance even 4.11may be needed .also a powerglide tranny has a lower first gear for good launches compared to the turbo 350 :eek: :eek: :p

Strick 07-02-2002 01:41 PM

Thanks for the advice guys! I completely over looked the gears. I have been racing dirtbikes over the last couple of years, and completely got away from cars.

Now off to the rear end forum for some advice.


2oldster 07-02-2002 03:17 PM

My opinion always was, want to go faster? Get a bigger motor. We took Chevy's out of Chevy's and threw in Olds Rockets. 88 Rocket makes a 56 Chev scream and you got a 283 powerpack left over to poke down a Studebaker........J2 Olds was good too

Michael Farrell 07-02-2002 10:00 PM

Strick I had the same problem with a 307 boat anchor, pulled it out and put in a 351 Cleveland, now have trouble keeping rear tires planted.

the fixer 07-03-2002 06:07 AM

If engine swap is a consideration may I suggest a 383 fast burn stroker that will burn your tires, a rear gear 4/11 or 3/50 , remember 4/11 will cost you top end , fun for street.
Nitris is good but you will always be looking for a refill and the last time I checked it is a bit of a hassle. Another good resource for your question is Summitt tech line

peglegrice 07-04-2002 02:20 PM

Do a gear, if it's actually an 8" Ford you can often find them used. Perogie Enterprises has stuff and Summit/Jegs carry gears. Stay in the 3's with the 307, 3.50, 3.73. you won't need any more than that.

Strick 07-05-2002 02:56 PM

I am going to bolt on a couple of parts onto the 307, and go with 3.55 or the 3.73 gears. I kinda like on the the responses above about the novelty of the 307 (dog motor). If the 307 can't bear the nitrous, I'll go bigger next time around.

jprowse00 07-07-2002 04:15 PM

what you need ,is a bit lower rear gear .i'll bet that a 3.50 /3.89 gear will bring your truck to life ..forget the cyl heads ,not worth the cost/trouble ..forget the nitrous ,not only is it dangerous ,hard on parts , you probably will find yourself with ZERO insurance coverage ..many companys will cancel/void a policy AFTER a loss , if the vehicle is "on the bottle"..just f y i..good luck ..jim p ..

dollybud 07-08-2002 04:12 AM

I agree with everything jprowse00 said, nitrous is for pros, if you want to fool with that kind of stuff..... build an alcohol engine. London rules jp, it's a great city.

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