I have a 77 Pontiac Ventura with a 231 Buick motor. I would like to put something bigger in it such as a 350. Is this a difficult swap? Will I have to weld in new mounts? This would be my first engine swap, how big of a project is this? I've torn down a inline six down to the block with my dad a while back so that's where I get a lot of my knowledge. I just want to know what I'd be getting into and would like any advice I could get.