Bill,
A bone stock 1995 R Code should make anywhere from 415-440 rwhp on a dynojet. Uncorrected the dynojet is a feel-good-liberal machine. That is on 92-93 octane with your boost retard knob turned up on the ragged edge of detonating and it probably will be even if you can't hear it. A healthy car with the purple pulley should be making at least 7-8 psi of boost.
Saleen had a "97 upgrade" as they called but actaully it was a fix from all of the engine failures they were experiencing with the 94-95
Vortech blown cars. It's the only way they could advertise those kind of crank hp nums back then. That being tuned on the ragged edge.
The 97 upgrade consited of removing the FMU,T-Rex inline fuel pump, replacing the fuel rails with Vortech fuel rails ( those are usually annodized blue or red ) , fuel pressure regulator on the rail, stainless fuel line, new in tank fuel pump, purging and drying out the charcoal canister from the return ( that's where the fuel smell comes from most of the time ) 47 lb. injectors and most importantly going OBD II ( lot's of pins ) comp. with a totally new tune. In 97 they were also known to add an Anderson powerpipe to increase the boost without changing the pulley or increasing heat soak from the dischage tube.
Anyone that owns an S351 supercharged of any year should get it dyno tuned immediately to know exatly whats going on with the car even if they think it's runnign great. That goes for the 99-00 cars also.
I could go on but that's the cliff notes version. Hope that helps.