Thinking about switching up intakes. Currently have a HSR with a EBL flash with the port mod. If i decide to go with a FAST tbi unit what problems could be encountered since the EBL has the port mod.....

The injectors won't be firing at each spark plug firing. So there may be some cylinder to cylinder fuel distribution issues. With a TBI injector firing scheme, each of the two injectors fires on a plug firing, alternating between injectors.

With the Port Mod the injectors fire once every engine revolution. Which on an 8-cyl engine is once every four spark plug firings. When the PW gets small it will revert to single fire mode. Which is a doubling of the PW and firing once every two engine revolutions.

RBob.