Possible 377 build-up questions
Thread Starter
Junior Member
Joined: Aug 2005
Posts: 1
Likes: 0
Possible 377 build-up questions
I am thinking about building a 377 motor for an 88-89 IROC with the original 305 TPI. Questions are; what head types (not necessarily brands) would be ideal? If I want to use a TPI setup, I am thinking of a LPE Superram or the TPIS high flow TPI setup, will I be able to find heads (new) for a 400 block that accept a TPI? Finally, where can I find a block for this engine?
Thanks a lot!
Thanks a lot!
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Welcome aboard.
Heads to fit a 400 block are no problem. Any Gen I SBC head will fit, you just need to drill the steam holes in the heads. You'll probably want heads with at least 180cc intake ports, maybe bigger, and 2.02/1.60" valves.
The Miniram is a sweet set-up with a high-reving engine. 377's need to rev, so keep that in mind.
World makes 4.125" bore blocks with 350 sized mains. A great place to start, but they are pricey. Otherwise, factory blocks are plentiful on eBay.
Heads to fit a 400 block are no problem. Any Gen I SBC head will fit, you just need to drill the steam holes in the heads. You'll probably want heads with at least 180cc intake ports, maybe bigger, and 2.02/1.60" valves.
The Miniram is a sweet set-up with a high-reving engine. 377's need to rev, so keep that in mind.
World makes 4.125" bore blocks with 350 sized mains. A great place to start, but they are pricey. Otherwise, factory blocks are plentiful on eBay.
Thread
Thread Starter
Forum
Replies
Last Post
