Straight six TBI, interesting. I've always loved Ford trucks up to '97 (3/4 ton+) as you could get them with a straight six that are damn near indestructible and with port fuel injection. Ford called it SEFI but it was a batch fire system. Still, I've never had an F series truck without that engine, love 'em. If I could get my hands on a 4.1 and that injection set-up though...
Too bad I don't have the engine anymore bud, though 4.1 is very small displacement though the 292 (4.8L worked better but still not a fast runnner though were durable.