Re: Help for a new guy
Hello Vern, I have one of those engines with the same casting number and mine is a 250. The casting codes at inliners site also verifys what you said. The first 2 pics are of the 250 I have stored with the same casting number as yours.
The 3rd pic shows the carb on the 230 in my '55 GMC. It looks like you have a Rochester Model M like the one on this engine. That is a 1 bbl carb so to put the Holley 2 bbl on you will have to get a 2 bbl intake manifold also.
I forgot to add that I don't see any major problem with your compression numbers. The 230 in my '55 has numbers similar to yours. Mine uses a quart of oil about 800 to a 1000 miles. That falls into a "good" catagory for me anyway. It runs great and gets real good milage considering the brick shape it pushes thru the air!
Hope this helps---Later---DAC
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Doug Crawford
Rapid City, SD
1970 GMC K5 Jimmy Mom drove 30 years
1972 GMC C2500 owned since 1979
1955 GMC 100 driver-project
2006 GMC Yukon Denali---wife's truck
Hope to have a '60 GMC Suburban again someday
Last edited by GMCDAC; September 8th, 2013 at 01:46 AM.
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