Re: 351w intake upgrade
The 351Windsor 4 barrel intake will bolt up directly just MAKE SURE to get the heads magnafluxed to check for cracks then get your heads and intake squared and have the intake and cylinder heads ported, polished and matched then get the thermactor bumps ground to a knife edge in the cylinder heads and get larger intake and exhaust stainless steel valves and have them tulip undercut and swirl polished w/ a 3 angle valve ground and have the heads and you may have the heads milled to bump up the compression and throw on a good set of 1.6 or 1.65 roller rockers and guide plates and pushrods if they aren't bent.
This is an OLD SCHOOL performance trick the 351 Cleavland heads and intake 2 barrel runners are larger than the 4 barrel Windsor heads and intake the heads as well would need all the other machine work done as well it would need a SPECIAL water passageway milled into the heads that is if you want to go old school. Cost though might be an issue but no matter what intakes you want you will still gonna have to have the head matched anyway just to avoid any issues.
1979 Ranchero 500