T.B.I. MOTORS

L03 - 305 cu.in. Small Block

History

The L03 first came in the 1988 Camaro and Firebirds.  It was in the F-Body until '92, but remained in GM's trucks longer.

L05 - 350 cu.in. Small Block

History

The L05 came in a lot of GM trucks and full size vans, as well as the full size Caprice.  Many of the Caprice cop cars that you see out there have the L05 in it.

The throttle body on these motors is the same as the 305 one, but it has different injectors.

454 cu.in. Big Block

History

The 454 big block with T.B.I. was only available in trucks.  Most popularly, with the 454SS sporty full size pickup.

The most common link to this engine and the TBI motors in Thirdgens is the throttle body.  The 454 TBI throttle body has 2" bores instead of the 305/350 throttle body's 1-11/16" bores.  The injectors are also larger in the 454 throttle body.