you dont. the money it would cost in machine work and parts is way more than a 350 would cost to buy.
If the Buick 305 is really a Chevy 305, then the motor mounts will interchange with a Chevy 350.
Oldsmobile used Chevy 305's. 76 350 rocket 77 305 Chevy
Yes they interchange
yes
YES.
with bolts and tighten
yes
no, it's internal. same as a 350.
If it's for a 305 it's a Chevy and will interchange with a 350. If it's an Olds, it won't.
YES they are the same.
A Chevy 305 is not a transmission it is a motor. If you mean a Chevy turbo 350 then the answer would be 3 different forward speeds and reverse.
if it is a 5.0 its a 305 if 5.7 its a 350