I have an underdrive pulley from a '90 454 big block it has 6 ribs like my TPI pulley. I'd like to put it on my 305.

Does anyone know if it will fit the bolt holts for my '90 305 crankshaft?


thx

 

The 3 bolt mounting pattern is the same on BBC and SBC. The depth of the pulley from the balancer to the outside edge is also the same.

I mix and match pulleys all the time to get the right diameters. The only real difference is that the BBC pulley should have a larger hole in the center to take out the balancer bolt and washer on the BBC.