Motorized Bicycle Engine Mount Block 1.24 inch

Aluminum Mount Block for under engine.
This size is for larger diameter bicycle tubes,
for Frame 1.24 inch diameter tubes.
Holes approximately 1 1/2 inches apart.
Holes for 6mm Engine mount studs.
Would need to be filed out for 8mm studs.
Aluminum Frames usually have this size seat post tube,
may be slightly tight on some aluminum frames..
Please measure.