GM Performance engine block
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Navigator
Joined: Oct 2007
Posts: 9
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GM Performance engine block
Hi!
I am about to build an big block engine for my 72 corvette. I plan to use a new block, not a mark IV. Will a mark VI block accept mark IV heads? I plan to buy the block on the link below.
http://store.summitracing.com/partde...5&autoview=sku
I know that this block has a one piece seal, so I can’t use a mark IV pan. The plan is to use all the original accessories, such as alternator, ps pump with brackets and so on. I want to keep the stock under hood lock. What will fit, and what will not?
Thanks, Kalle
I am about to build an big block engine for my 72 corvette. I plan to use a new block, not a mark IV. Will a mark VI block accept mark IV heads? I plan to buy the block on the link below.
http://store.summitracing.com/partde...5&autoview=sku
I know that this block has a one piece seal, so I can’t use a mark IV pan. The plan is to use all the original accessories, such as alternator, ps pump with brackets and so on. I want to keep the stock under hood lock. What will fit, and what will not?
Thanks, Kalle
Le Mans Master
Joined: May 2003
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Likes: 3,558
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
I'm not sure about GEN6 blocks now( I've read that some do and some don't)- but you might have to run an electric fuel pump (no provision for mechanical) and if running a manual trans -there might not be a provision for your z-bar. (SDPC has a solution for about $60).
As far as the hood clearance- to look stock-can use old boat anchor cast iron w/ spreadbore- or look for a LS6 aluminum-but then you're looking at rect port heads. Or you could spend some money and go w/ a 3/2bbl set up (oval or rect heads).
As far as the hood clearance- to look stock-can use old boat anchor cast iron w/ spreadbore- or look for a LS6 aluminum-but then you're looking at rect port heads. Or you could spend some money and go w/ a 3/2bbl set up (oval or rect heads).
