Well, the valves are fine and the timing looks correct to me. As far as I can tell, it's impossible to be on the wrong stroke if cylinders 1 and 4 are on TDC and the cam timing plate fits. After trying a couple drops of oil in one of the cylinders, I got it up to ~35psi or so, but I didn't get into too much work with that.
Right now, the SVT isn't going to be at Carlisle. I swapped the wheels onto my ZX3 and I'm taking that there. I have a real hard time imagining that the head gasket is leaking, and I checked valve clearance and that seems to be OK, and the timing is good (or it should be). Yet I have 30psi compression across the board.
Can fuel washed cylinder walls really cause that much loss in compression?