Nismo240s wrote:... basically if the block and the head (except for cams) are the same
Basically, yes.
The head is a different casting (different valve cover bolt pattern) but is otherwise identical.
There is a very minor change in the upper front cover...although they look identical, they are not. If they are swapped, you will leak oil everywhere from right near the distributor. FYI...
The bock is also identical in most respects...
There are no advantages to either block, except maybe the age of the '97 versus the '93.
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And the OBD thing...it's brought up EVERY time someone asks about a motor swap (KA --> newer KA, or the opposite)...and it ALL ELECTRICAL.
Just because one came in a car that had OBD-I and it's going into a OBD-II car....since the head and block are basically identical, the ECU and OBD is none-the-wiser.
When you swap, retain the intake and exhaust manifolds with the chassis, and use the same ECU and electronics...doesn't matter which head/block you use. ECU can't tell...
- Brian