Ill back that up.those are 73 up.i parted 2 73 454 trucks at same time.a 1/2 ton SWB and a 73 3/4 454 both factory bb trucks according to option sheets.the 1/2 ton and 3/4 ton were different length.i cleaned up the 1/2 ton set and painted to put in my factory small block 79 Blazer 2wd.and the BB and SB towers were identical so i didnt bother to change.also the rubber mounts are same as the 72 only towers SB and BB along with the to the motor clamshells.The 72 towers the top 2 bolt holes are like 2" apart.I have a set,but for sale,a board member wanted,but no $$$ yet,its been sufficent time.
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