Will these fit on my Lo3 engine? And would I have to change anything else when putting these heads on. Will they give me better performance too?? Thanks Alot
Murph

 

Corvette L98 heads are alluminum 58cc (same
as yours). F-body cast iron L98s have 64 cc.

Either way, would be an improvemnet on our heads.

Do you have an L03 IROC too?

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Dare to be different-
build a 305! <gasp!>

 

they will need to be milled to get the stock compression back, iF u dont do this u will acctually loose power.....

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1989 pontiac firebird
bright red exterior(just repainted)
grey interior
5 spd
305 TBI (stock)
WS.6 formula wheels
3.73 posi rear end
http://members.aol.com/j007golden/Mikey89.html
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1985 trans am
factory bright yellow
4 wheel disks
16 inch wheels
305 TPI
power antenna and mirrors
t tops

 

Yea I got an 88 Iroc-Z
305TBI

 

by the way, the cylinder heads have 64cc. This would be a big improvement from stock? How many more hp guessing?

 

ttt

 

uh, no, the more ccs in a chamber the less compression you have. Youd be about on par with the finest Briggs and stratton has to offer

and... hotrod cc'ed the stock L03 heads and came up with 55.3 cc's