I bought this '68 Riviera (w/ 430) and the PO claims the engine was rebuilt before he bought it, but has zero records of it. From all outward appearances, I don't doubt it: Edelbrock Performer intake, Edelbrock carb, some chrome on and in the engine bay, completely new aluminized mandrel-bent exhaust system... Looks like somebody actually spent some money on it. There was even a pair of "430-4 Stage 2" valve cover stickers in the glove box (unused/new). The engine doesn't smoke at all, and lopes like it's got a cam in it, so I'm pretty sure it has been rebuilt. What I don't know is what's inside the block - cam, pistons, overbore, or even if the block was original to the car. (I'll try to get the block and heads codes tomorrow.) My question is about using a dial indicator on the rockers to deduce what the cam lift is. If I pull a valve cover and turn the engine over by hand so that I get full lift on an intake (or exhaust) rocker, will a dial indicator give an accurate cam lobe lift measurement - considering that the lifter may absorb part of that lift. Any other suggestions as to getting some answers without too much digging in the engine?