To remove the blind nuts just tap them out from the fron of the firewall. I used the supplied screws and and a hammer. Very light taps till the nut comes out.

I think I needed 4 new holes for the motor mount. I don't recall exactly how I arrived at the correct spot. Probably mounted the motor to the mount first. Marked on the firewall the correct position for the crankshaft and then marked the outline of the mount on the firewall for the mount.

I can't say how the plae would perform with the a 46 cause the only engine I've used was the 91. I think a 61 would be perfect.

I hated installing the elevator split pushrod. Other than that I was a straight forward assemby.