So is this a TBI intake with Vortec heads? I do know GM made some TBI/Vortec 350's in 1996 for export to Mexico. And even made 2004 trucks with full L31 Vortec 350's in them for Mexico. They were called 400SS trucks.

The 3/4 ton and/or 1 ton vans in 1996 also used this TBI intake with Vortec heads. It was rated at 230hp and 340 lb/ft torque. Normal L31 Vortyec 350 was 255 hp and 330 lb/ft torque.

Does the intake have 8 vertical intake bolts (2 at each corner) this is a Vortec head, or does it have 12 intake bolts total this is a TBI head?

peace
Hog