To upgrade intake manifold on not?

I have the long TTIs in my 72 340 duster with manual steering and power brakes. There not that tight and I don’t have clearance issues. Can easily change plugs, get to the stater, and change the long wix 51510R oil filter with the 90 adapter... we put flowtech longs on my friends 70 Dart and that was a huge PITA; plus he only has about 3.5 clearance from the ground..