nope.. it was 100 dollars for the valves and 48 dollars to have the old pistons taken off the rods and put the new pistons onto the rod and have the pins pressed into the rod. I put the rods back onto the crankshaft. so mitsu didnt really do antyhing.. i got the pistons for 625 and it's stock compression.. car runs perfectly now.. too bad it would have a turbo for a long time.

 

No. You can do it simply by removing the head and oil pan (both upper and lower). Aside from removing difficult to reach bolts, it's actually fairly easy. It's more tedious than difficult. Piston ring gapping can be difficult if you don't know what you're doing, but it's a lot less complicated than it sounds, and other than that it's just turning the wrench left to loosen and right to tighten.

I think you need a pneumatic press to get the wrist pins out of the stock pistons (assuming you plan on using the stock connecting rods), but if you get aftermarket rods then you don't even have to bother doing that, and you can push the pins into place with some fresh oil and a little effort.