Just looking at ebay, I see someone if offering a stroker pack that has the crank, rods, pistons, cam, gaskets ect. It appears to be a full bolt in kit. What am I missing? They run between $2k and $1500 depending on the compression (pistons). Is this a true bolt in kit? Also if they are, can a 10.0 / 1 compression run on pupm gasl? The 10.0 / 1 is rated at 100 HP and the 9.0 /1 is rated at 60 hp.