I, personally think you should get rid of your walbro 255 in favor of either a 190 or EVO 8 fuel pump. Rewire either one of these 2 would be plenty. Therefore, you wont need a AFPR. Also, factory 450cc injectors will work perfectly fine as well, without breaking the pocket. You can easily get an EVO 8 fuel pump *which I have* and some 450cc injectors for $100 all day long. That leaves you with $300 for an AFC and maybe a little tuning time. This is my opinion.