I have never, I’ll repeat that, NEVER ever regretted putting an overdrive in anything. It’s always worth it and is the one single modification that you can do to a vehicle that makes it more enjoyable to drive AND doesn’t change how the car performs. Everything I build now gets roller cams and overdrive. Cutting the TB crossmember and tunnel work sucks but it’s worth it and at least it can be ugly because it’s covered by carpet. US car tool and others now make bolt in crossmembers for most swaps so that’s an easy button. My D100 with a 3:55 gear and a 46RE rips down the freeway at 75-80 mph at ~2200 in OD. You can drive it for hours and not hate it or get run over by semis going 65mph. Do it, you won’t regret it when you’re finished.