mass9c1 is correct. cars with TBI v8 (both 305 & 350) had roller hyd cams; trucks with TBI v8 got flat tappet hyd cam.
Only the 9C1 350 got the larger exh Ypipe; it also got the L98 cam, 65 lb/hr injectors and the revised calibration in the ECM to suit the cam + exhaust, so it got rated at 190, 195 or 205 fwhp (in 1989-90, 91, and 92-93 respectively). The civilian TBI 350 was always 180 fwhp.
Trucks, OTOH, got a lower-restriction louder exhaust and a cam that was not as large as the L98 cam, but it was also larger than the std 305 or civilian 350 cam... so they were rated at up to 210 fwhp in their last year in light trucks/vans (1995). Trucks usually had lower CR than the car engines, and that was done IIRC by having dished piston crowns. The heads should eb the same swirl port heads used on the cars. Trucks probably had 4 bolt mains but that doesn't help power at all.
There were also some slight differences in the truck TBI units, vs the ones used on cars, because some of the fleet-type light trucks had built-in speed govenors on them. I think there are example pix on the Thirdgen.org website. HTH.
EDIT: PaulD --- the Championship sod is doing nicely. Maybe there will be a 2nd installation in a month.