93z28de

hay there how are you all to night my ? is how can i tell a l98 corvette head from a lt1 head bye looking at it i have a casting # and i think i may have jumped the gun its 10207843 i cant tell if its a 8 or 6 any help is a big thanks

ascastil

iTrader: (2)

I believe its 7643, which is the desireable lt1 casting for porting.

94stripperZ

LT1 heads wont have the large coolant crossovers next to the intake ports on either end

93z28de

well i guess i need to take them back lol

96capricemgr

iTrader: (1)

Need to take them back because they do have the cooling ports? The casting numbers can be deceiving sometimes just due to casting quality. 6-8-3 can all easily be mistaken for eachother.

93z28de

yes no cooling ports trying to do a gen one motor

whytryz28

iTrader: (28)

So you're doing a gen I engine but you have LT1 heads?

96capricemgr

iTrader: (1)

You might consider adapting the heads? Is the gen 1 going to be using say the TPI injection system? If so LT1 heads and intake are a pretty meaningful upgrade. They do need to be drilled for the coolant crossovers and distributor.

93z28de

well i got good news and bad new's good news looks like some one set them up for a gen1 block bad news they were for my dad so now im eating 200 some bucks. and maybe getting a mixed up dream motor lol i all ways liked the tpi but loved the lt1 top end so whats the bast thing to do make a lt1.5 as im going to call it. gen one block with the lt1 heads and intake now what do i do for ecu or dizzy?

96capricemgr

iTrader: (1)

Couple options. I believe there is a Vortec rearmount distributor that can work with the LT1 pcm or the TPI could be made to work especially if you already like that system.

RamAir95TA

iTrader: (2)

Makes absolutely zero sense to go through the hassle of putting LT1 heads on a SBC block especially when the selection of heads for SBC outnumbers the LT1 20 to 1 and at a MUCH cheaper cost.

93z28de

finding l98 heads or something around lower Delaware is a pan and i do not like iron heads because i will run boost and iron head's are only good for boat anchors now days,just how i feel

whytryz28

iTrader: (28)

A set of LT1 heads are cheaper than a set of aluminum sbc heads since they will most likely be aftermarket.

96capricemgr

iTrader: (1)

This is the key, he bought them at core head price already modded.

93z28de

96capricemgr this is true and even if they had not been done i know how to do it all my self

93z28de

so how can i find some post were other ppl have done this swap