Ram 1 = WI 4spd = 321 / XN Auto = 92
#31 D-Port cylinder heads
Ram 2 = WU 4spd = 98 / XT Auto = 12
#96 - RA Round-Port cylinder heads
VIN stamped on passenger front face of block.
If build date is before May , it won't be a Ram 2
1's and 2's all came with 3.90 Posi rears
PHS / BHC engine designation code 347 for Uno's and Deuce's.
Build date and Math seperates them.
Good Luck to You !
400 HO is a fine car too.
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