thanks for the info . i am convinced that it is a 53 high pressure head now. as i said, i have 54 235 full vpressure block under it.and vthe head has vthe 18 count head bolts. so i believe i have a good set up to drop in my 1950 3600 series.i have had it all rebuilt at the local machine shop,that shrunk my wallet. my fat finger keeps hittin the v button, sorry. well thanks again to everyone who helped out.r/c 66.
