Engine What Valve covers fit the trickflow heads and rockers without modification ?

Most roller rockers require some extra clearance. I believe even the stock covers require removal of an internal baffle. Several aftermarket "tall" covers work but often require an upper intake manifold spacer which in turn may interfere with a stock hood. It did on my 86. Sorry I don't know about the carb covers but shouldn't be too hard to figure out. Place the covers on the heads with out bolting them down, have someone bump, not start the engine, and see if the rocker hits the covers. If the covers are not bolted down they will just bounce up if hit by a rocker. You could also cycle the engine over with a breaker bar if your want to go a litle slower.