I decked the block on mine and I am running H802CP pistons. I am running an old Crane cam and a Clifford header with 2.5" exhaust. I over bored the throttle body as well. I love it. It runs on any grade gas with no ping and I have 250k miles on it.
My best recommendation is to get an AFR gauge and install it on your vehicle. I find it helped dial things in the best. Mine is a Renix and I run a MAP adjuster I designed myself and I can dial the fuel exactly where I want it without a dyno and it has helped me catch a bad sensor a couple of times that would throw the computer into open loop mode. When everything is dialed in, I get 21mpg on the freeway on long trips and 18 mpg pulling my teardrop.