SB rockers hitting springs and retainers

you know...of all the engines put together in the last 10 yrs or so...I have only bought one set of custom length pushrods for a standard or eddy head 360...

my Demon has 3/8 diameter 7.50 length pushrods with 1.6 rockers...seems to be running ok....71 Duster had 5/16 diameter...standard 7.50 long for solid cam..71 Dart is only one with custom length...even with milling of block and heads I needed longer pushrods...all using 1.6 rockers....I can only tell you what works for me on this end of the world...

the 1/6 procomp aka speedmaster stainless steel rockers use the stock 340 length pushrod...ball and ball ends ...rocker has the cup ....