391 Sbc
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
391 Sbc
Well, my 400SBC project is trashed. I had it bored .040" over with a Scat 9000 crank, Eagle LW 6" rods, KB Hyper pistons-everything internally balanced. Well, my buddy trashed the #1 cylinder, so it's back to the drawing board. I'm considering a 391 buildup-I just don't really want a 383(nothing against it, but I want something different). I have a Howard's small base circle HR 236/242 duration; 535/555 lift w/ 1.5 RR's. My heads are aluminum ProTopline 200cc/64cc's, Air Gap intake, full MSD ignition(6A,distributor,coil). I plan to use 6" rods and internal balance again. Any of you guys have a 391? Oh yeah, my pan was custom made, but I think the rails are for a stock motor. In other words, is the added stroke of the 391 going to require a different pan? How much clearancing is the block going to need? Any input is appreciated. Thanks.
Clearancing and other work for a smaller motor doesn't seem like a good idea to me, unless you can't find a 400ci block 
