Amazon is the cheapest so far with 320$ nos powershot kit but no inject plate. And 447$ for the cheater kit, I light as well and get the cheater kit for less then 100$ extra but it says its adjustable from 150-250 so there is know 125 shot
thats just the jets that it comes with (150 to 250), that doesn't mean you can only use it within that range. you can buy different jets seperately and jet it down to other sizes (50,75,100,125 etc.) but the max on that kit is 250, which is plenty even for most race small blocks, but the big guys get into foggers and 2 stage kits with the big solenoids that allow up to a 500 shot. just save up and buy the cheater, and buy either the 75 or 100 shot jets seperate to go with it (up to you, but i'd start off with a 100) , you can start with that then work up to 150.