37 chevy frame...HELP !!

I have a 37 chevy coupe that came with a frame that I believed to be stock (body was not on frame). After speaking with Chassis Engineering about putting a IFS under it, I realized I don't have the right frame.
I was told that 37 came with a "Top Hat" frame. According to my master parts catalog, I have a "YK" type frame (channel side members), maybe from a 34 chevy.

Best as I can tell, body mount bolts seem to be in the correct place.
Can anyone tell me if this "YK" frame can be used on my coupe?