QUOTE(euro911 @ Jul 27 2014, 01:42 PM)
If you have the motor out and partially disassembled, half the battle is over.
If you have the time and a little play $, pull the heads and barrels, inspect the cylinder bores and check your rod play.
If the cam and lifters (and cam bearings) are OK too, you can re-ring it and lap the valves and seats (although your leak-down #s look ok). 15 #s is low though … it's only 8.5% of your highest compression reading (130 psi). I'd pump more in there to obtain a more accurate reading.
You've got a little homework to do.
Wait. I did my compression test and got 115, 120, 130, 130.
My leak down test was done at 100 psi and there was only 2-3 % leak down on any cylinder. I think I'm good there.
I'm not tearing into the bottom end. I have another motor that I'll build while I drive this one. I was just wondering if the 15 psi difference in compression would be worth tearing apart the top end.