Newbie with questions

I figured out the double F8 code, it’s the body and roof color since it has no vinyl top.
The D2T is deluxe vinyl bench in saddle tan.
The T3 is still unknown to me. Something about the upper door frame?
It’s definitely not the original engine because it should be red if it was a 273 so I believe it’s a later 318 which is fine for now. I still need to find the casting numbers.
I still want to convert to a 4 speed, but I think a 360 would be more budget friendly than a 340 and this isn’t a resto. I would still like a bulge hood with 340 call outs because I prefer the look over the plain flat hood.
I’ll need to source a new rear end at some point in the build too.
I’m thinking of either keeping the F8 green or switching to gold but changing the interior to black either way and adding a black vinyl top because they look nice.
For now I just want to get it running and driving but I’m not in a rush because it’s as hot as the surface of the sun out there right now. Lol.