Help identify cam please

Much better cam choice if you already own it
72 340 went to 8.5 compression (advertised- really under 8) do you have the early pistons? if so maybe 9+ : 1
run that cam and see how you like it if it's already in the motor
compare the specs with the newer XE274HL
as with the TRW cam you do not need that longer exhaust with headers or heads with a better than stock flowing exhaust port
check the tag on the differential and report gears
with 110 LCA in at intake centrline of 106 is 4 degrees advanced
I also agree that the COmp is also too big
ixnay on the stock 340 cam or the comp 268
answer the compression question if you can
Lunati voodoo line would be a benchmark for off the shelf cam as even the Comp XE274HL may (most likely) be too big depending on gears and compression and that's the only choice from comp unfortunatly