[blood62]

i think is a small difference 1/8" but it should be a bolt on

200R4 and the 350 are the same length as far as i know

the 700R4 and 400 are longer but match each other if that makes and sense

the 60,61,62 frame are odd balls i believe they are wider 42" vs 33 1/2" your going to have to find a junk cross member and do some creative welding to span that gap or use 2 of em to make a wider one its not going to be easy i am having similar problems with just swapping in a 350 for my 235