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crankshaft options

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Ponti:
Hi Matt.
 Could you help me. I'm starting to gather parts to build a blowen SBC 140" slingshot.
 I've been looking round for cranks and I've seen loads.
 One suggestion was to get a SBC crank with a BBC snout. Do I really need it?
 I know that whatever I get will need to be double keywayed.
 If it is better to go for one with the bigger snout which is best? The other problem with it is I've not seen a timing chain set that would fit, or am I missing stuff.
 Hope you can help, I'm probably overthinking or just confusing myself.
Cheers
Andrew

dreracecar:
The BBC snout is the premier solution and have been running the same crank and hub and gear drive for the last 20 years,
 Second would be the stock dia snout with the ATI crank hub w/ BBC seal dia and a crank support
 Third (at minimum) would be the stock crank and ATI hub and check the hub retaining bolt frequently

  The stock crank needs the snout to be 1.25" longer to be reliable without the crank support and if you use a hub using the SBC seal dia, there is not enough material left from the keyways to the seal surface and the belt load splits the hub and rolls the key out of the crank. This wasnt a cheap hub either, it was the the top of the line RCD units and have seen 3 of these split.

dusterdave173:
Got a part number on that ATI hub? Is it the same hub they use on their dampers? Thanks

George:
http://www.atiracing.com/products/dampers/charts/supercharger.hubs.htm

Ponti:
Cheers guys.

Who makes cranks with the BBC snout?

 And what about timing chain and gears? As obviously a standard SBC set won't fit.

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