What heads could I use on a 1992 block, people talk of 083"s
but what is the realcode numbers on them

 

083 is the last three digits of the iron 350 TPI head casting number. All the numbers that come before the last three are useless for figuring out which head to use. You can really use any head you want on a 92 block....

 

as long it is 87 or newer right

 

you can put on any head you want. older than 87 will need one style of intake bolt pattern, 87 and up will need the newer kind. you can get angled washers though. what kind of intake are you using?

 

ZZ4 intake

 

well I don't know if the ZZ4 is the new or old style bolt pattern. Anyone know?

 

A "ZZ4 intake has a conventional SBC intake bolt pattern and angle.
A 083 head that came form a L98 TPI motor will have the center two bolts at a different angle on each side. you can
elonggate the center bolt holes on a ZZ4 intake and use washers under the bolt heads.

Vortec heads require a "vortec intake"

Early pre 1968 heads don;t have the alternator bolt holes in the ends of the heads.

TBI swirl port heads are not worth using for performance.

LT1, LT4 heads will not work on a conventional SBC without mods to the water cooling holes on the decks.

Some of the 70's era smog heads are not worth using 882 624 993 etc.

A 305 head will bolt on but requires larger 350 sized valves to make decent power.

 

Thats the info I was looking for, thanks