Um, right off the bat, theres a lot different.
The chassis side of the engine harness really should be swapped over to the 95 along with the dash cluster. That would be the easiest and simplest way to do it I think.
Otherwise you will need to match up what the 93 chassis side engine harness does power wise.
1993
http://www.lt1swap.com/93lt1a4.htm
1995
http://www.lt1swap.com/all_lt1.htm
Sounds like you are missing injector or coil power.
The chassis side of the engine harness really should be swapped over to the 95 along with the dash cluster. That would be the easiest and simplest way to do it I think.
Otherwise you will need to match up what the 93 chassis side engine harness does power wise.
1993
http://www.lt1swap.com/93lt1a4.htm
1995
http://www.lt1swap.com/all_lt1.htm
Sounds like you are missing injector or coil power.