Another piece of the puzzle solved.. when the block spacer is install the converter is too far rearward. So this spaces the crankshaft t/c hub register to the right depth.
t/c spacer


Next in the list are frame side engine mounts for the AD truck.

So shortly all the items needed to bolt in 4200 with either 275/290 HP into an AD truck will be ready.

Last edited by efi-diy; 03/01/14 03:10 PM.
51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them