I have a 96' GMC Sierra C1500. it has a 305 (5.0L) that the miles are getting high. I have a SB400 to install in its place. If I want to keep the stock intake(which i've spent $ having ported and opened up) it being fuel injection, and use Edlebrock E-Tech heads, larger injectors, and basically everything else off the stock 305, what problems am I going to run into? also who makes the best reflash program for my ECM? (obviously have to reprogram) Has anyone done a swap on a 96-98 truck and not just replaced the engine with a Stock replacment?