305 with 350 heads I have heard that 350 heads will not fit onto a 305 without getting the cylinder bores punched out, on account of valve interference with the cylinder walls. Is this true? |
Considering as how plenty of factory 350 castings are 1.94/1.5" valves, they (valve sizing) will fit. Whether or not it's smart to put 350 heads on a 305 is a whole new matter. |
I have a pair of heads from a 327 that have 2.02' Intakes. I suppose they wouldn't fit. |
In most cases, there isn't a problem. But, you should limit valve lift anyway. The biggest issues are valve shrouding by the cylinder wall, and chambers too large for proper compression ratio. |
Bump so as not to start my own thread. I'm going to be putting 350 heads on my 305. I'm assuming I should get head gaskets for a 350? Is there going to be a detonation problem at all withe the 1/8" ((4-3.75) / 2) mistmatch all around the circumference of the cyls? |
Are you kiddin me? With that whopping 7:1 compression ratio you are going to make, there wont be any problems with detonation! |
Originally posted by DuronClocker Bump so as not to start my own thread. I'm going to be putting 350 heads on my 305. I'm assuming I should get head gaskets for a 350? Is there going to be a detonation problem at all withe the 1/8" ((4-3.75) / 2) mistmatch all around the circumference of the cyls? Most of the gaskets are the same. For some odd reason a few of them are listed 327/350 only. Havent figured that one out yet, I guess I better go look for water in the oil of all the 305's Ive used 350 gaskets on. :) I guess If you were to use 64ishcc heads and flat tops the compression wouldent be too low on a 305, sure would idle smooth with 7:1 compression. ;) |
Originally posted by ljnowell Are you kiddin me? With that whopping 7:1 compression ratio you are going to make, there wont be any problems with detonation! |
305 LB9 heads = 58cc combustion chambers Aluminum LT1 heads = 54cc combustion chambers My compression will go up...hopefully to 9.8+ :) |
Hey, it'll run on the cheap stuff! lol! Thats the truth! |
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