As for the weight differance in BB and SB I was stateing the weight differance I personally measured between a 67 440/727 and a 71 340/904 (I know a 340 never came with a 904 but the one from a 318 bolts right up ) both still had the iron intakes iron heads... and the differance between the two was almost exactly #200 a low deck might be a little closer but I did not have one to weigh.
would you mind posting the total weight of those combos?
Btw, very intresting thread, first I thought it will be a SB/BB contest, but lots of good info here. Moparts is still the best place to hang around to learn... Greetings, Frank
) both still had the iron intakes iron heads... and the differance between the two was almost exactly #200 a low deck might be a little closer but I did not have one to weigh. 
