you will need a bigger gas tank lol
Best place to ask would be on www.trifive.com
Weld in new motor mounts and cross member.
so what im going to do when i get that far is,1st get whatever mounts came with the engine that im puting in mach and make sure with a empty tranny where i want the mounts to be and then bolt it onto the crossmember 2nd make sure everything is going to line up and make sure the rear end will take a new driveline you maght have to get one custom and balanced,3rd if all goes well bolt it in hook up linkages and wire and start, ps the gas tank will not be that big of an issue you'll just have to stop more often.
You do know that a 235 and a 350 have different bell housing bolt patterns ! What trans do you Have ! also trans mount drive shaft swap pending !
Looking for a Used Bel Air in your area?
CarGurus has 206 nationwide Bel Air listings and the tools to find you a great deal.
Search Chevrolet Bel Air Questions
Chevrolet Bel Air Experts