Correct me if I'm wrong PDQ....but it also seems that when you are looking at them, the tall deck has a different looking factory intake that the standard deck BBC's. It seems that the water neck comes in at a different angle or something. This might help if someone thinks they have a tall deck but really doesn't.
The tall deck intakes are different (wider) due to the fact that the decks are400" taller, which sets the heads a little higher and farther apart than on the car blocks. This is why the distributors are longer on the tall decks as well. A suburban block would not be considered a tall deck as pdg stated (unless someone put it in there).
They also made a 454 tall deck block for medium duty trucks and busses (in addition to the older 366 and 427 blocks). The spacing between the water pump inlet to the block and the head should be closer to a half inch (0.40") than an inch unless it is an aftermarket tall deck block which can run over 11" tall.
A forum community dedicated to 1st generation Chevy Camaros owners and enthusiasts. Come join the discussion about performance, builds, restoration, modifications, classifieds, troubleshooting, reviews, and more!