I looked up the 305 specs that were originally in my friend's 1982 Trans Am that I just helped him rebuild a 330 horse 283 for. The 305 in 1982 was good for 145 hp and 205 lb-ft of torque. The torque was okay down low, so it may be a good economy motor for a truck. However, I don't know if it would make any more torque than an I6 would.

By the way Saw4by...I checked with my friend on that tall deck 427 in his garage. It is spoken for, I'm afraid. There are plans for that motor...sorry.

52 GMC 3/4 ton pickup
68 Big Block Vette
68 455 Firebird