Posted by AAA on Friday, June 06, 2003 at 5:05PM :
I dont know if the M37 is like this - but I did use this method with a Rockwell T-223 from a W500. Remove the bolts and cross member end brackets at the frame and use the crossmember to "step it" up or down using the horizontal lower frame rails.
You might be able to do the same with the M37.