After ordering manifolds and a Zenith replacement for a MS TSX 363 carb for my 1950 77 Row Crop, I find that my old manifolds are off an 88. Guess someone put either an 88 head, or whole engine, into the 77 (I know, should have pulled the old ones and checked the #s first). My questions include whether the TSX 363 carb replacement will provide enough fuel for an 88 engine. The studs on the Zenith are smaller than the MS studs (whatever TSX it was, when are the tags ever on the carbs?), but the spacing on the studs lets the Zenith fit to the old manifold. Do the Zenith replacements usually have smaller studs than the MS carbs? Will the Zenith work ok once tightened up with lock washers, or will it shift? Anyone know? I'd rather not have to mount a $200 carb and then find out it doesn't work out (after it can't be returned). Thanks for any help.

Ed