Lehman 80 drawing and specs required

[Hoghead]

I am thinking of replacing my Lehman 80 with a Beta 90 and would appreciate if anyone can provide me with a dimensioned drawing of the Lehman so that I can compare with the Beta.
I suspect that the Beta is smaller but an expensive mistake if not!

Also the HP and torque curves for the Lehman. The graph I found on the net is a bit difficult to read

Thanks