Hope Tranny Mike see's this but: My 86 with original 305 bored .30 over, and trans which is I guess the 200r ? has a lagging slide into 2nd and 3rd gear. Then is sluggish in the other gears sometimes slipping back and forth between the OD and 4th? When you stop, sometimes it does not downshift and the truck almost stalls. Is it time for overhaul or what????