No, they will not.
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.
No. You will have to get v-8 mounts.
NO, They are made different.
NO IT WILL NOT. Must use V-8 frame mounts and motor mounts.
yes and no yes in that it can be made to fit no in that a Chevy transmission has a different bolt pattern than Oldsmobile's, Buick's, and Pontiac's. the motor mounts are also probably going to be different. However you can change the motor mounts and there are companies that make adapters to use a Chevy transmission with a Oldsmobile, Buick, or Pontiac engine. I have seen an adapter to use a ford transmission with a Chevy engine.
7/16"
Chevy 350 is just what we call that motor because Chevy is the most popular of the gm lines, but really its a GM 350. Having said that, a Buick, Pontiac, Chevy, or Oldsmobile motor are the same motor for the most part. There are som exceptions with the Cadillac motors but that's an other story. should be smoothe sailing for you.
Get the motor mounts, trans mounts, transmission, radiator from a 1976 Malibu or Monte Carlo and swap them in.
No thay are not even close.
it will never happen