ok tired of the stock TBI on my 87 V20 350 and th400 4X4. was looking to go with multiport fuel injection 3 companies making this for my truck holley accel and edelbrock. already talked to edelbrok and they said they will onlt calibrate their chips to work with their parts. can't seem to find tech articles or porduct reviews from the other 2 manufactures anyone here have any expirence on this?