Currently I have a fully built, turbocharged B18C1 engine in my 1993 Civic sedan. With 9.5:1 compression, and a GT30R turbo, I'm still not satisfied. It's fun in boost, but bottom end is lacking, which is what brings me here. I have a H22A1 sitting in my garage that I'm planning to build up.

Here's what I have available to use so far.
H22A1, stock.
QSD H2B adapter, balance shaft delete, K2H intake manifold adapter and RBC manifold.
Eagle rods
And Hondata S300 in a P28 ECU, ID1000 injectors, 2.5" Tanaka exhaust (currently).
68mm throttle body on my B18 right now.

As of yet, I haven't decided if I'm sleeving or just using Mahle Gold pistons. And I haven't decided what I'm doing for head work. I'm deshrouding the valves, cleaning up any casting lines in the intake and exhaust, but I'm apprehensive to polish or really hog out the ports.

Back to my question, what size throttle body would you guys recommend? Stock for the K20 engines is 62mm, same as the H22 I have read. I have the Karcepts K series adapter, so any K throttle body can work, or I have some aluminum plate to make another adapter. Don't matter. People are saying somewhere around 70-75mm