its do to not many 3rd gens having 350s..u can tell on a 3rd gen if it is a 350 if the 8th digit in the vin is a 8.

383s are nice..i like long rod 377 more though..there just better i think plus u can run bigger valve heads and not worry about sending a valve into the cylinder wall and a 377 will rev up faster and make more tq.