pull the motor and redo it on the stand-
this way you can tear the motor down to heads on, everything else off-
now you will have the time to wash out the engine bay, clean off all that oil and grime from the past 15 years-
doing the valve springs will take you less than 1.0 hours when the motor is on the stand!!! so your saving time right from the begining!!!
clean the block, headers,valve covers, blah blah blah ect ect ect--
maybe even pull the cam out and inspect the cam bearings---
my buddies car was running like a top-- we pulled the motor just to inspect it over--- good thing cause his cam bearings were shot
we ended up doing a cam, bearings, all the gaskets, and got it back into ship shape--- if we hadnt pulled the motor, then we would have never seen the bad cam bearings from the beginning-
ship your car to me-- i can do it over the weekend
hth