okay i'm thinking maybe this year i might be getting my engine for the 69ss i'm restoring. will the 502-502hp fit exactly like the 396 did? are there any difference's? thanks gary

yes...
the rear mail seal is one piece... require 'n a oil pan made for a one piece rearmain seal block.... the oil pan shipped on the g m crate bigblocks are truck pans and DONE FIT AN A BODY ..but g.m. and moroso make pans for the new blocks...
chevy high performance.com (it's the mags web site) has a build up of a 454 ho g m crate motor... yes I know you're looking at a 502.. but the engines have the same things different about them ...than an older still big block...
the store is (FRANKENRAT) it'll update you on all that has changed on the rat motor world....
hope this helps

Gary, You will also need an electric fuel pump, as there is no place on the 502 to mount a mechanical pump. If your car is an original 4 sp with the Z-bar linkage, you will need to drill and tap the block for the ball stud or get an adapter. The deluxe kit comes with a short water pump. You will need to get a long pump if all of your accessory brackets are 1969 or later. That's about all I can think of right now.

Tom