Good to see another honda lumpage going in!
Don't worry about your knowledge of cars beforehand, I was the same tenfold
, you learn as you go, no one teaches you this stuff, you've already pulled the lump out the sol, thats some good going there already
Unless you got some super plans for the engine then keep everything simple, don't replace what you don't need to, if you heard/drove the engine before and its starts and goes and don't leak then keep with it
For the fuel tank everyones got there own two pence for it, so heres mine - keep it simple, use a SPi/MPi tank and just change the fuel pump, some people run the MPi pump but I don't, so take your choice
Run some new 8mm (internal bore) lines under the car, some copper pipeage from B&Q is fine, you can use the honda fuel pump if you want (as its looks/runs similar to the MPi one) just needs a little work but nothing major for you
Your 13" are a 50/50 when it comes to choosing what Final Drive would be better for you, whats better for me might not be better for you, I ran the 3.4 with a b16 and that made it completely driveable, only downside was the gears were nice and long now but the b16 power wasn't enough to pull aggressively after 6k like it was before 6k, on the plus side I had five perfectly useable gears for the road. A couple of people (on here) have got b18's with a 3.7fd, one with 12" and the other with 13", just waiting to hear how they are finding there gears.....