[Brian Hummell]

thank you scott and dave

after more research last night. i did find a thread on performance years for pontiac. mid year 1976 there was a switch to that hub in automatic with a tall highway gear for the 350s and 400s through 79/80. which this car has 2.73 or 3.08 gears in rear.weight savings and lower rpm. below 2500 rpm. was a bullitin sent to dealers for it.

if i do install a regular 6 3/4 balancer will it throw balance off on crank and rods?

they were supposed to have been balanced before assembly.

maybe it is time to build a 400 or 455 instead.