Time for an overhaul

[CopyKat]

I don't need one I have a yellow one, black one, pink one and a white. I may have a red one also.

The block itself yes is better for a 91 but I don't know if the heads/gaskets/bolts can support a 10:1 compression AND 5 psi boost at the same time.

Fawk I'm thinking of sticking with the 91 heads I have on right now if they are not cracked.

 

[CopyKat]

OK this pretty much explains which way I'm going.

Copycat - installing the 95+heads on a pre-95 shortblock will result in a copression ratio of around 10:1, normally necessitating the need to run premium fuel, depending on conditions. 99.99% of the time - no ping results and in those few that do, it usually the result of other factors combined.

DO NOT expect to be able to run boost with that compression with the ODB1 PCM unless you can find a tuner that really knows how to crack into the PCM and tune it properly (key word is 'properly').

Bird

The 91 heads are going to stay, but they will get ported on the exhaust side.