Hemidenny K member club?

OK for you in the know.I have been looking at the HDK system for awhile and emailing Denny.I'm doing a 69 Valiant and want a semi pro touring car with some sort of small block.Besides getting rid of a lot of stuff that's in the way what are the other advantages - handeling etc over doing a major upgrade on the factory stuff for about 1/2 or more of the price of the HDK