Thanks, it must have been a terrible feeling to have bought a late 1984 Corvette, only to find the improved TPI 1985 car just around the next corner!TBI is throttle body injection. One TBI unit is needed on 4cyl and V-6 engines. Placement wouild be similar to what a carb would have been on those motors
CrossFire on the Corvetrte and F-body engines uses two TBI units, one for each bank, located opposite from the bank of V-8 cylinders it feeds.
The CrossFire engines were not a performance engine, by observation, but looked the part with their "cross-ram" style intake, similar to many later '60s drag race engines. With the intake manifold off, the port sizing was even smaller than for a 4bbl V-8! The later Tuned Port Injection (TPI) motors were MUCH better in all respects!