cam help

ok sorry ill try again
bought an 84 gn the engine was apart had some parts had to buy the rest
the cam was i think an elgin e913p 204-214 449-473 lift
but it was a pre 84 cam after some research they changed the base circle on the cams in 84 by .030
the car ran ok but just dont seem right
tt chip at 17 deg im at 23 deg with almost no retard
any knowledge or help would be welcome