Hey Bob,
I'm not a guru, mainly because I've had lots of good luck with my set-up.
It's a J35 3.5L 10lbs of boost. Stock pistons and rods. Stock computer.
Got five seasons out of it so far. Guess the trick is to baby it and it will last.
The Honda motors are like 10:1 compression stock,
so if you boost to 7lbs I'd suggest 110octane minimum.
At that boost I think you'd be lookin' at about 400HP.
Mine still runs hard on the peddle but doesn't idle smooth like it used too.
I realize I'm living on borrowed time with mine, but like Lee said,
Crusty can buy a short block for $1200 with a few valves too.
Hope that helps, and good luck to whom ever is looking to use the Honda power plant.
R-