BBM 400/500 Stroker Kit

what kind of compression would this kit run with 84cc heads and .039 compressed head gaskets? could this kit be built to run pump gas and survive on the street at the 600 hp level with mildly ported eddy heads? very interested in buying this kit and then saving up to have you build the long block for me at a later date. does the wrist pin sit up into the rings with the long stroke? i have read that 470 was the biggest you could go with out the pin being into the rings.