i took my 54/3100 in to the shop yesterday to have the muffler replaced that a backfire destroyed. plenty of hangers on there, asked what kind of engine i had in the truck. my answer was a corvette. they thought LT1, not so, early corvettes had a 235 (53). just don't let them look. i also have duals so it helps with the illusion. would like to have the new straight 6 for all the air and other improvements. but will stay with the old 235. ron