CLASS RACER FORUM - View Single Post

80 monte · 10-23-2009, 02:11 PM

Anyone else have a source other than GM perf as cometic does not carry anything under a 4.100" bore gasket. The 305's require somewhere in the 3.800" range bore on the gasket, if I go too big I am going to loose comp. and sealing capabilities and maybe the chance of heat soaking the spark plug cooling jackets.

10-23-2009, 02:11 PM	#6
80 monte Junior Member Join Date: Oct 2009 Location: Cloverdale B.C. Canada Posts: 5 Likes: 0 Liked 0 Times in 0 Posts	Re: 305 head gaskets Anyone else have a source other than GM perf as cometic does not carry anything under a 4.100" bore gasket. The 305's require somewhere in the 3.800" range bore on the gasket, if I go too big I am going to loose comp. and sealing capabilities and maybe the chance of heat soaking the spark plug cooling jackets. __________________ It's only a 305 305 0.030" over, 12:1 comp, 461 casting heads, 1.90" in & 1.50" ex, Comp Cams XE284H, [SIGPIC][/SIGPIC]