Another engine swap question 400-305-454

[peterpeter211]

I have a 72 C20 Cheyenne. Came with a BB 400 from factory and somewhere along the line some one installed an early 80s caburated 305. Some one is offering me for free a 3/4 ton 1982 silverado with a TBI 454 and 4 speed transmission. Truck hadn't been started in 10 years.

I am thinking about taking the truck and canabalizing the engine and transmission plus maybe A C parts for my truck.

Any thoughts on if the engine and transmission will bolt in?

Any one have any thoughts about this engine?

I'm considering just trying to sell the 8 2 and use the money to buy engine and transmission for 72 but I would save a bunch of money if I can swap engines out.

Thanks