hei stands for high energy ignition and refers to the distributor. previous distributors used points and later distributors were controlled by the on-board computer.
Clockwise. The 72 Chevy 350 engine did not come stock with a HEI unit. No matter, the rotor still spins clockwise.
No.
1.8.4.3.6.5.7.2
If it is a Pontiac 350, any hei distributor out of any size Pontiac motor up to 1979 will work.
0.045
yes the 4.3L vortech has the same motor mounts as the 350
If the Buick 305 is really a Chevy 305, then the motor mounts will interchange with a Chevy 350.
yes.
negative side of the coil
I DON'T KNOW!
No, they will not.
No difference in the engine. It is all in the trans and the rearend