Need help identifying my 350

[DLG69c10]

i just bought a stock 350 4bbl carb motor that i took out of a 1978 gmc c30 dually pickup. the block casting #s are 3970010 and the heads #s are 462624. Tried looking online for factory(stock) specs(hp, torque etc.) on the engine but had no luck. Can anyone help me out id really appreciate it! Thanks

[ka_jd7and1]

'78 truck 350 is 265 hp give or take 10 horse.
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[DLG69c10]

265 hp?! not a bad start for a stock motor. it had been sitting since 96 so i tried turning it on yesterday. Put some gas in the carb and wired up the starter and sure enough it turned on the first try ha

[oldspowered67C10]

Block and heads casting numbers make sense for that truck so are likely the original parts. How many hp variations were available as a 350 in 78 in light duty trucks?

[DLG69c10]

Im not sure, ive been trying to find out info on these trucks but no luck

[GASoline71]

I had that exact same engine in a 1979 GMC K25. Great truck... it went to 325,000 miles on the original engine before I rebuilt it. I rebuilt it with a little more compression, better cam, and an aluminum intake and a Holley 1850 carb. I was the second owner. Wish I still had that truck today.

Gary