Your 37 looks great, Must be fun to have. Yes these swaps on the early thirties trucks seem a bit complicated. I do have the bell housing with brake and clutch attatched. Looks-as expected, that i will definitly need a different bell as the bolt holes are almost an inch and a half wider on the newer 235. Yes I thought I might need that shortened pump but hopefully , since the engines are close to the same length that there is enough room between the radiator and fan on the '56 235 since it is only about a half inch longer --or so it appears. meanwhile I am wire brushing the chassis now that I got the old engine out last night.---