Below is a photo of the different torque mounts I've run across. Left to Right: 1974 465/203 (what came off my truck), 1972 Blazer 465/205, ? year 205. The farthest right was correct for my '74 after I swapped in the 205, everything bolted up in the factory holes.
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'51 South Bend Model "9A"
'56 Chevy 3600 NAPCO
'74 Chevy Cheyenne Super K20-restored on 37's
'72 GMC Sierra Custom K2500- in progress
'08 GMC Envoy Denali
'12 GMC Sierra 2500HD Denali
'17 GMC Yukon XL
VCCA member #58596
http://www.nohrco.com