well ever thing will swap over besides the top/shell, the doors, the seats are completely different mounting, door skins are different, every thing from frame down is the same if were talking about the same models, the 78 will have the np203 and the 73 will have the np205 transfer case, both came with sm465 4 speeds or the turbo 350 automatic trans. the front end on the 78 can be ether the gm 10 bolt or the Dana 44. on the 73 it is only the Dana 44. the rear end will either be a gm 10 bolt or a gm 12 bolt in the 78 and in the 73 it will only have the gm 12 bolt rear end. dash stuff will swap, the whole front clip will swap over, some a/c parts will swap, but is mostly a tad different. the grills can swap but they are different, the tail gates and bumpers are the same.
yes?
Some parts from any (later) 94 and up will fit.. some parts will only fit from 1998 and up. Engine parts from 1996 - 2002.
Yes it will.
YES it will.
Assuming you mean 1973 Ventura, some parts will (door skins and quarter panels, for example)
wiil a 1999 blazer engine fit a 2002 blazer
Fit 96 grill in 95 blazer
Yes it will fit.
An alternator from a 2000 Chevy blazer will fit a 2002 S10 blazer with a little fabrication.
No, won't even begin to work, Hole different design.
NO.........
Yes, the doors from a 98 Chevy Blazer will fit a 2001 Chevy Blazer with a little moderation.