wow. welcome, and DAMN thats one hell of first post.
anyway... your gonna reach your head gaskets before you get to the LIM gasket. so if your going deep on the engine block, i'd replace that one while your in there.
As for seafoam, (someone else might say something more about this) but i'd run some BEFORE tearing the engine apart, and see if your possibly leaking from anywhere else. that way you know what parts you may need.
but if the car is paid off, and your willing to spend this kinda time/money (sounds like your car has been well used) personally, i'd consider just trading this one in, and using the repair money as a deposit to get a newer/lower mileage one. but thats just me. (at 170 miles its certainly not gonna run ALOT better in the future)
But i'm in the same boat as you. I can open things up, but i'm no expert. You'll probably get some of the gear heads to reply tomorrow afternoon (bored at work posts)
