will a 350 work in place of 305 without much problems,

it would be an easy swap, as long as both engines are of similar year. If both are carburated, externally, they are identical, so it should be a very simple swap. The only possible snag I know of is the flywheel and harmonic balancers. The 305's normally use a 7" balancer, which is not compatable with 350's. Some 305's had a 12" flywheel, most 350's use a larger one (13.84" I believe). Other than those two issues, it should be a painless swap.

Go to www,montecarloss.com for complete instructions for this swap