A 76 engine would probably have an early HEI system. possibly the one with a remote-mounted coil. Later ones went to the coil-in-cap setup like the V-8's. Displacement would probably be 250 cubic inches, with a possibility it would be a 292. 292 engines have the passenger's-side motor mount offset about 3 inches, while the 194, 230, and 250 engines all have mid-engine mounts directly opposite each other. All of the inline 6 engines newer than the 235/261 type will have the same bellhousing bolt pattern as the V-8's.
Jerry

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!