Looks like you may be over adjusting the pushrods. In most cases 2 3/4 to 3 1/4 turns is all thet is required. It depends on how many threads per inch you have on the pushrod some pushrods are 16 threads per inch and some are 24 threads per inch.
I may be wrong but I think the S&S pushrods are 24 threads pre inch and somewhere around 18 flats or 3 turns should get you in the correct range.
You should turn the engine over until the cam is on the base circle then adjust the lose pushrod by hand until it makes contact with the rocker and the lifter, you can tell because you can not move the pushrod up or down.
Then do the 3 turns on the pushrods and after approx 10 minutes you should be able to spin the pushrod by hand.
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.