It looks like a 2-piece neoprene seal for a big block Chevy V8 can be adapted to the GMC sixes- - - -228 through 302. It will require machining of the block and rear main cap, somewhat similar to the way a Chevy six is done, and fabrication of a seal holder from either steel or aluminum. Then make a small change in the seal surface diameter on the crankshaft. This looks like a fairly straightforward operation for any engine machinist with a few brain cells to rub together! Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
That actually looks like it's going to be simpler than the conversion of a Chevy block for the full circle lip seal. More info as I develop a prototype! Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Currently, I've got four GMC engines- - - -a 228, a couple of 248s, and a 270. Two more 270s are on the way soon. If my idea works as I hope it will, I'll be making several of the adapters.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!