Hi Clois I Have the same problem you do when my motor is hot. I have a 501-533 comp cam with hydr lifters in it their is restrictor in my shelby heads. PAW sells a 11/32 chrome moly push rod part#
PR-705 you mite want to call and see what they say? They have the same push rod for both types of cams. Let me know what you find out. Rick Lake P.S. You would want to know if the pushrods and hollow in the middle to lube the rockerarm end.