[JTS]

Now I'm learning , about modern muscle , by all the information I can gather thru , this forum ,U tube Katech , LMR , LMP , and others. The Mods your friend had done , less Cam ,Head porting , E mods an tune, 83 rwhp doesn't sound disappointing.
Would of been nice as stated above to have a base line ET , Track time , to compare too. That being said , feel of the pants in the driver's seat should feel impressive, 83 HP back in my day , took way more mods than bolt ons, Compression, Cam ,big port work (before aftermarket heads available) strong internals , along with top of the line headers , blueprinted Holley Carberter. Modern muscle has com a long way from the days past.