New here and got a strang question
05-14-2011, 12:21 PM
#1
3rd Gear
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New here and got a strang question
How's it going guys. I'm new here and have a question regarding something i have. I have a 91 firebird formula, 305 5 speed manual.
The motor is burnt so i picked up a 350 bored .030 over, out of a '91 z-28...I have a set of heads out of the 86'-87 corvettes, casting number F2 14101128. It looks like they will fit on the block quite fine. Look to line up. But these are angle rods were as my setup is straight rods. I've been informed that i need new exhaust headers to fit the heads.
I don't have casting number off the block right now. I need to have the heads rebuilt, being charged 150$ a head. Have not done that yet, still looking. Is there anything special between a corvette of those years (86 - 87) and a 91 camaro 350 and a firebird formula that will affect the performance or even running of the heads. Any help is appreciated.
Also will my valve covers fit over these heads fine? I know no difference between the 305 and 350 physically, but i don't know what the vettes had at the time of 86-87.
The motor is burnt so i picked up a 350 bored .030 over, out of a '91 z-28...I have a set of heads out of the 86'-87 corvettes, casting number F2 14101128. It looks like they will fit on the block quite fine. Look to line up. But these are angle rods were as my setup is straight rods. I've been informed that i need new exhaust headers to fit the heads.
I don't have casting number off the block right now. I need to have the heads rebuilt, being charged 150$ a head. Have not done that yet, still looking. Is there anything special between a corvette of those years (86 - 87) and a 91 camaro 350 and a firebird formula that will affect the performance or even running of the heads. Any help is appreciated.
Also will my valve covers fit over these heads fine? I know no difference between the 305 and 350 physically, but i don't know what the vettes had at the time of 86-87.
Last edited by DarkNova; 05-14-2011 at 12:28 PM. Reason: addition to question
05-14-2011, 03:18 PM
#2
Safety Car
As far as heads go everything from late 86 on were aluminum and were center bolt design. I have no idea about a 91 Z28 block but from 87 on the L98 was a roller cam block.
05-14-2011, 04:25 PM
#3
Racer
Everything you're doing will swap over just fine - the only things you didn't mention - you'll need larger injectors for the engine and then a computer tune or at least a memcal out of a 350 equipped camaro/firebird.
To answer the questions I read:
- The valvecovers will swap over just fine.
- The heads will bolt up just fine - but be sure to use the correct intake as the bolt holes are different than the later intake (center 4 bolts are more 'vertical' on the later intakes) - or you can mod the intake to fit the center bolt angles.
- The engine block should just be the same 1-pc rear main seal block that was in most every car and trucks from 87-99 (minus the later LT1 car stuff)
- There is nothing special to doing a valve job on the heads - $150 seems reasonable if they are to disassemble them, clean them, surface them flat, re-surface the valve faces, 3 or 5 angle valve job, machine them for PC seals on the intake and exhaust, and re-assemble them (have new springs put in if you're going with a larger cam as the stock ones are kinda weak and don't support a lot of lift) and checking all installed spring heights and pressures.
To answer the questions I read:
- The valvecovers will swap over just fine.
- The heads will bolt up just fine - but be sure to use the correct intake as the bolt holes are different than the later intake (center 4 bolts are more 'vertical' on the later intakes) - or you can mod the intake to fit the center bolt angles.
- The engine block should just be the same 1-pc rear main seal block that was in most every car and trucks from 87-99 (minus the later LT1 car stuff)
- There is nothing special to doing a valve job on the heads - $150 seems reasonable if they are to disassemble them, clean them, surface them flat, re-surface the valve faces, 3 or 5 angle valve job, machine them for PC seals on the intake and exhaust, and re-assemble them (have new springs put in if you're going with a larger cam as the stock ones are kinda weak and don't support a lot of lift) and checking all installed spring heights and pressures.
