Dowel pins needed??
 

Ok guys....Im putting in my BBC that has a front and back 1/4" mid-plate. Problem is tht the dowels that stick out of the back of the block are not long enough to stick out past the back mid-plate so that the transmission can align up and be supported. My local speed shop sold me 1 1/2" dowels. Im not sure this is long enough. Is that the stock chevy size or will the 1 1/2" work. Right now I have the ones that came with my 1978 BBC and are the stock ones. Those stock dowels are currently flush with the back of my rear mid-plate. Thanks to all in advance.

The dowels are press fit. You can tap them out. It sounds like they are just in too deep. Your mid plate is normally only about an eighth inch thick.

They make 2" long dowels also. Check Summit or Jegs.

x2 id get them

We put the long ones in our RED and then discovered we could not put the glide in with the coupler. Had to tap them foward.
:)

fla1976 ...once again...
 

Once again...thanks. It turns out the stock ones are 1"
the ones I bought are 1 5/8". The midplate is 1/4" and that was part of the problem. The 1 5/8" now stick out 1/2" past my midplate. perfect. I was affraid that if I used the 2" or even 2 1/2" that I saw in Jegs/summit that it could be a problem sliding my trans back in order to remove when needed. Its a tight area right there in this tube chassis.

Thanks for the help guys!! :D