Installed

 

All day making a mock up motor plate, almost done, the hardest part was finding the crank center line in relation to the rear end, now to transfer it to make a real part.

More work on the motor plate.

How thick is the material for your adapter plate?  For aluminum adapter plates, I like using ½” thick.

Lorena, Texas (South of Waco)

This is 7075 .250 thick, however there is a .750 adapter between it and the block (still need to make it)

Here's a back yard trick, I used a 2 1/2" hole saw mounted in the rear main (with a bearing), with a centering drill bit, I then leveled the block on the shop floor, found the center of the motor plate 
(used a template for the bolt pattern), slid the motor plate on the drill bit, perfect center, (block and motor plate level to the floor) found I needed to correct some of the holes (my poor work transferring them)





 

More, Y Block holes drilled, used part of a bell housing for pattern.



 

More work today, motor plate roughed in, took a long time. 







 

 
Fitting the engine today

New problem, block hits the frame, I'll grind this off tomorrow.