Different HorsePower ratings - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Husker · 12-26-2007, 11:52 AM

I have a 350 4 barrel 4 speed 70 GMC 4x4 what would the horsepower rating be? Were there only 2 different rated HP 350's or more. Cannot see the block number and the heads have what looks kind of like a tall skyscraper off to the outside edge.
Thanks for any help and Merry Christmas to all.
Ron

**70cst** · 12-26-2007, 12:37 PM

My 70 Chevelle has a 350 4b. rated at 300hp. I think the 2b was rated about 275hp. I might be wrong but I do know my 350 4b was rated at 300hp.

**WorkinLonghorn** · 12-26-2007, 02:39 PM

You could only get one 350 on light duty trucks,the 4 Brl. In 1969 and 1970 it was rated at 255 GROSS HP (200 net HP).
If it isn't the stock motor it could be anything. What are the numbers on the passenger side head front?

12-26-2007, 11:52 AM	#1
Husker Registered User Join Date: Dec 1999 Location: Mid NE USA Posts: 2,212	Different HorsePower ratings I have a 350 4 barrel 4 speed 70 GMC 4x4 what would the horsepower rating be? Were there only 2 different rated HP 350's or more. Cannot see the block number and the heads have what looks kind of like a tall skyscraper off to the outside edge. Thanks for any help and Merry Christmas to all. Ron __________________ Member #111 68 C-10 Daily Driver 70 4x4 Project 76 Jeep CJ-5 Help Support the Board: http://67-72chevytrucks.com/vboard/payments.php He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors. Thomas Jefferson

12-26-2007, 12:37 PM	#2
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,374	Re: Different HorsePower ratings My 70 Chevelle has a 350 4b. rated at 300hp. I think the 2b was rated about 275hp. I might be wrong but I do know my 350 4b was rated at 300hp. __________________ A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder!

12-26-2007, 02:39 PM	#3
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,883	Re: Different HorsePower ratings You could only get one 350 on light duty trucks,the 4 Brl. In 1969 and 1970 it was rated at 255 GROSS HP (200 net HP). If it isn't the stock motor it could be anything. What are the numbers on the passenger side head front? __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. Last edited by WorkinLonghorn; 12-26-2007 at 02:41 PM.

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