edegraaf

I am looking for early 350 heads for a 403 olds engine build. I am located in Hoosick Falls , NY (Albany area)

olds403

What is your budget? Have 4's and 5's. Heads will be magged.
Bare castings. Not Going to give them away, but good stuff

ROCKETMAN269V

I have several sets of early small block and big block heads. The head bolt holes will need to be opened up for 1/2" head bolts on any early heads that you get. I can have a set ready to bolt on if you like, or just sell you cores. I sent a set, all done, to a member here for his 403 and he is very happy with the results. Email me to discuss: drolds1@bellsouth.net. Thanks, Bob.

joe_padavano

I would read Mark's thread about "C" heads on a 403.

olds403

If on a trans am BB heads and rpm intake will not work with shaker hood. Can be done with mjds

ROCKETMAN269V

No difference between small block and big block heads, as far as any clearance issues are concerned.

joe_padavano

His point was that the BBO heads on a 403 require an intake with enough meat to allow porting to match the heads. The Performer RPM is the most common intake used with this combo, and it will not allow the shaker scoop to clear.

Of course, first, the RPM is not the ONLY intake that will work. I believe the out of production OL4B has enough meat, as do several stock iron intakes.

Second, the OP didn't say this was going in a Trans Am, so this whole tangent may be moot.

edegraaf

this is for a firebird Formula, no shaker hood.