Nope- - - -he's got a new, high pressure heater core, also. I'd guess the head gasket or the water pump seal will be the weak point, so the 7# cap is a good compromise- - - - -original equipment through 1960 0r so.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!