318 cam and heads help

hi i have just changed the camshaft in my 318 engine to a Hughes Engines HMC1326AL-9+5 Whiplash Series. the heads are 318 (302) heads and the heads have been ported. I have also replaced all the valve springs and Retainers from a pair of trashed 360 heads (596).

and i have a big problem with the 302 heads, 2 rockerarms have been junk after this, and 2 valevs have broke, they have gone off at the ground of the Valve locks??
it is only on the exhaust valves and exhaust rockerarms.
the push rod have ram right through the rocker arm.

I use the original rockerarms.

it is broken at various times. and the engine run really good befor the breakdown.

the enigen is a stock 1988-318

http://www.hughesengines.com/Index/...V2hpcGxhc2ggTXVzY2xlIENhciBDYW1z&partid=25113