new Suby!

at my local salvation army car lot i ran across a 1986 subaru gl hatch turbo hi/lo. the were asking 800 i ended up paying 600 for it. it ran good except for the headgasket being completely gone. its got 77,000 miles and not a speck or rust. dent on the front fender otherwise very clean. i got it apart and it was pretty clear the passenger side head was a no good. but i found a good one at the junk yard out of an 86 xt turbo. anyways its running great lots of fun but i do have some issues ive got a lifter tick, kinda annoying so im in need of some good lifters so it will shut up. and there is a lot of sun damage to the vinyl around the seats so i need a black interior. i would like to swap black wrx seats to the front but i still need rear seats. Oh, also what is the solution for putting an aftermarket stereo in. mine is to deep and sticks out to far.

Thanks