[pahinui31]

first off is that a top half noise try listening to the timing chain cover.chains stretch,chain guides get eaten.try using a long extension on the timing cover and listen.i'm pretty sure the pushrods are the same between the 2&3ts as well as rockers and chains.i only used to get timing chain noise on mine.my 80 rolla was my first car i bought it when i was 14 had it for 6+ yrs. did a lot 3t btm,2t head and flywheel,norris 460 cam(i think been a while)i know it had a 290 duration aka high lift rough idle ,doug thorley ss header,holley 390 4 brl carb,4-speed trans,5 spd rear.let me know how it goes. peace!!