This will probably be of some help.
also, an addendum that for some reason is not included. This, however, only applies to "Street Rods", which PA defines as vehicles manufactured 1948 or earlier (or repro's of said vehicles).
And finally, if you want to know where the PA inspection mechanic is supposed to get his training info, here it is:
Specially constructed vehicle fact sheet:
Specially constructed would cover your scenario as well as dune buggies. Specially constructed vehicles are inspected asthe type of vehicle they are.
Meaning your car would have to pass all of the passenger car inspection criteria.
It does not qualify as a street rod or reconstructed vehicle.
Obviously, rules get bent from time to time, but I am thinking you are going to have a very hard time, if not impossible, doing what you are trying to do in PA.