Im lookin at getting some new heads for my 305, and I know i need to keep 58 cc combustion chambers and 1.94/1.5 valves. My question is with 58 cc combustion chambers will the chamber size extend over the cylinder bore, being a 350 head? Also which would perform better, the alum. L98's or the Vortec's (if that release date for the TPI mani. ever comes)?

Thanks
Jeremy

 

I've got the L98's on my 305 and there are no clearance problems. If you wanna have 58cc chambers with the Vortecs you'll have to have them decked (I'm not sure on how much). Car Craft did a build-up with decked Vortec heads and they didn't have any clearance problems either.

-Mark W.
'88 SC Camaro w/ 305 TBI

[This message has been edited by Mark305TBI (edited October 10, 2000).]

 

Can i use regular 305 head gaskets then, or will i have to run the 350 gaskets?

Also how much were the ported heads from SDPC, Mark?

Thanks!
Jeremy

 

Both of these heads require a 350 head gasket. The Ported heads are pretty expensive, they cost me right around $1,000. Post on the SDPC board to get an exact price.

-Mark W.
'88 SC Camaro w/ 305 TBI

 

Use 350 gaskets.


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