Need help! 350 Engine rebuild ideas "Build Plan"??
Thread Starter
Racer
Joined: Sep 2009
Posts: 429
Likes: 2
From: Oak Ridge NJ
Need help! 350 Engine rebuild ideas "Build Plan"??
I have a 1975 350 date coded block that runs strong for an original engine. The problem is its not enough horsepower and needs some "grunt" with a possible rebuild. I have a set of freshly rebuilt 67"hump heads" that I'd like to bolt on and looking for an engine build plan to finish it up, with replacement pistons/cam/lifters/block decking and any modification that can be done to the crank for added HP. Not looking to break the bank, just looking for roughly 375 - 400 horsepower. I'm also not looking for a blower application and being told 10:1 pistons are are an option. (I know I'll have to run premium fuel)
Looking for the head rebuild paperwork to find out what CC the chambers are - 60 comes to mind - but not sure. I will post later.
Here are the numbers on the heads;
3917291
K27
GM3
I have the latest JEGS rag and priced out a ZZ383 for roughly $6,000 that I know I can build my engine cheaper. Should I stoke my engine? Not sure of the costs.
I know the details are vague but need to promote discussion to ensure I'm getting the right build plan for my money - All engine machine work will be done by a qualified machine shop. If anyone can recommend a shop in North Jersey, it would be great.
Mike
Iggycat
NJ
Looking for the head rebuild paperwork to find out what CC the chambers are - 60 comes to mind - but not sure. I will post later.
Here are the numbers on the heads;
3917291
K27
GM3
I have the latest JEGS rag and priced out a ZZ383 for roughly $6,000 that I know I can build my engine cheaper. Should I stoke my engine? Not sure of the costs.
I know the details are vague but need to promote discussion to ensure I'm getting the right build plan for my money - All engine machine work will be done by a qualified machine shop. If anyone can recommend a shop in North Jersey, it would be great.
Mike
Iggycat
NJ
Instructor
Joined: Jan 2008
Posts: 208
Likes: 0
From: McDonough GA
A hundred people would do it a hundred different ways.
When I worked there, I used a recipe for 400+ HP and 350#torque. It made sense to use somebody else's knowledge. Granted, I didn't use every single item like a crank scraper, but I'm happy. Go to:
http://www.summitracing.com/expertad...p=techarticles
http://www.summitracing.com/expertad...p=techarticles
Instructor
Joined: Jan 2008
Posts: 208
Likes: 0
From: McDonough GA
Your heads are a late '66 to '68 vintage with 64cc chambers.
Camel hump heads originally on 302/327/350 engines. They're desirable heads with a higher spark plug hole than the earlier #3782461 heads so you can use a dome piston. Also, the quench area behind the plug was relieved compared the earlier #3782461 double hump heads. Some of your heads came with 2.02 intake and 1.60 exhaust valves on the 327 Corvettes but most had the 1.94/1.50 valves. There are no accessory holes in the front so you'll have to adapt, improvise and overcome alternator mounting issues. Aftermarket parts will solve that problem. They'll respond well to some porting but balance out the costs of having a lot of work done with the idea of buying some iron aftermarket heads already tricked out. Aluminum heads are always a notion; that's next for me.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
I would not use those heads. They are old school technology. Look around at the builds using Vortec heads or recent aftermarket. You can get the power you want. Sell yours to a C2 collector and move ahead 30 years. My .02
Racer
Joined: Mar 2008
Posts: 315
Likes: 0
From: KY
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Agree completely. See my post I just made in the 383 stroker thread, about old school technology & heads.
