Small vs big block distributors

[73 Mike]

This may be a stupid question, but I've asked those before too.

I assume the difference between small block and big block distributors is the deck height (or more precisely, the height from the cam to the intake deck) and as a consequence, the height of the mating flange. Having said this, some of the aftermarket distributors say they can be used for both.

I'm selling a tach drive HEI and a guy with a big block wants it. I don't think it will fit but wanted to be sure.

 

[big2bird]

A Chevy Dizzy fits SBC or BBC. Same dimensions.

 

[SHAKERATTLEROLL]

That is the nice part about Chevy . As said By Biggy2Birdie they will fit both.

 

[TimAT]

Unless it's a tall deck truck block. But then, GM never made one of those with a tach drive either......

But hey, all they needed to do was lower the dizzy mount pad on the intake. Maybe they did??

 

[Twin_Turbo]

Or you mill the collar off the housing and go with an adjustable collar.

 

[73 Mike]

Thanks guys. Now I know.