Im sure there are heads out there that flow just as well as the vortecs that will bolt up to the tbi and you wont have to get an adaptor, mess with accessory brackets, and so on
I'd be looking at EngineQuest aftermarket heads. They've got an exhaust crossover, you should be able to use your existing TBI intake manifold, and exhaust manifolds, which would save you a huge amount of money--about the same as the cost of the new pair of heads.
https://www.ebay.com/itm/CHEVROLET-...ash=item27f225a521:g:VS4AAOSwkNZUkw~G&vxp=mtr
If I'm understanding the photo of the heads, they've even got the angle of the center bolt holes correct for TBI use.
EngineQuest CH350G is as close as I know of. My single concern is the exhaust manifold bolt pattern. I dropped iron exhaust manifolds years and years ago, I don't remember if the iron manifold uses the very rearward (7th) bolt hole on the heads. These heads don't have that 7th hole.
https://www.ebay.com/itm/Chevrolet-350-V8-87-95-VORTEC-CHAMBER-Complete-Cylinder-Heads-pair/173155979357?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649