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79formula
07-24-2012, 12:50 PM
im wanting to put a 350 in this firebird but i only have 305 heads what do i need to do to get this to work.
GreaseDog
07-24-2012, 01:48 PM
Head gaskets, and head bolts. Not optimal heads, but they will allow it to run.
TheBigMortboski
07-24-2012, 06:24 PM
Yeah, they flow like crap, but they'll bolt up.
bigk10
07-25-2012, 12:37 PM
its a waste of time to put the 305 heads on, it will run that way but wont be fun at all, i would try looking on craigslist or junkyard, pull a cheap set and take em to a machine shop to get magged and fluxed shouldnt cost more than a few hundred bucks
matt167
07-26-2012, 09:02 PM
You can port them out and they will flow 'ok' but there no real winner in any respect except for a 305/331. Stock there not going to pull past 4k ontop of a 350. The second problem is compression, which will be too high for 87 octane, and will require 93 octane to run and not ping...
GaToy
07-26-2012, 11:21 PM
You can find 350's on craigslist all the time.
bowtieguy101
07-27-2012, 01:28 PM
Unless they are the 305 HO heads, installing them on your motor will only restrict it. the HO heads can be worked into pretty decent heads.