https://bringatrailer.com/listing/1970-porsche-911t-coupe-64/#comments-anchor
A really clean '70t coupe with a non matching #s 2.7l with mfi and non-original color just hit $86k on BAT, didn't hit the reserve but they closed the deal after, would guess in the $90k range. I would think a modified to 2.7l matching #s motor with webers would be about a wash vs the non matching # 2.7 with mfi of the BAT car, maybe a little in your favor. The coupe is definitely more desirable than the targa though. I'd have to see more pics and your interior but a rough guess would be in the $75-80k range, curious to hear what others think though. I also have a '73t that I plan on selling soon, but it's a coupe in a rare original color with a matching #s 2.4l, thinking it may pull 6 figures based on that recent BAT auction.