the montes current engine a 305 has a blown head gasket, and although it seems to run well it is slowly dying which is why i've considered this
i think i'm going to rebuild the 305 in one of my montes and use the 4 barrel intake, quadrajet setup on the top end and possibly the heads and transplant them on top of this 350. i hope the heads are decent. if the combustion chambers have a crappy shape to them(305s are notorious for breathing issues, often a problem with the heads with their exhaust port and a lack of space on the side of half the valves to allow a efficient detonation) i'll find a pair of cheap vortecs or maybe go with some fully built world heads which seem to be really cheap. this will be a very mild hydraulic roller built for mpgs, not power. already priced everything. should be under 1500 to build the whole shabang.
and the vortecs perform very good in stock form.
Wonder what it would take to pu t a 350 in a bump. Just curious, I know all the hard core guys are going to crusify me but has anybody done this. Used to have a friend that had one in a 60's F100.
Never put a Chevy in a Ford, that's some real oil and vinegar stuff there, but I did put a 1970 350 Oldsmobile Rocket with a Turbo 400 in a dent side years ago. Had both just sitting there and a friend talked me into putting it in. Made up some motor mounts, used the transmission cross-member out of the car and installed it in the truck, seems to me the worst of it was the radiator hoses, as everything was in the wrong place and I ended up with a goofy looking arrangement to say the least. 4:11 gears, Edelbrock intake, Thermoquad off a Dodge Magnum, a W30 455 camshaft, transpack shift kit and 2 1/2 inch duals to the rear. Even at that, most of the power gained was from meticulous tuning and re-tuning of the carburetor and distributor. What she lacked in purdy she made up for in the GO department, as she beat car after car and made some owners of nice shiny cars wonder how an old ratty looking F250 just cost them $100. 
Glad I don't do such silly things any more. Not sure if I made as much as the tickets cost me, and was the only vehicle I've had that the State Patrol do an on the spot vehicle inspection to. 