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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#79953 07/13/2007 12:54 AM | Joined: Oct 2006 Posts: 29 Junior Member | | Junior Member Joined: Oct 2006 Posts: 29 | I have a 1974 250 cid block that is crack.
Engine was rebuilt not to long ago. So would like to use all the good internal parts that I can.
Replacment block is out of a 1965 Chevy Truck 230 cid. ? Want to turn 230 cid into 250 cid?
It looks differant on the Aft rear outside of block. Meaning casting looks not as strong as a 250 block.
Not sure on the inside? Cam Bearings differant?
My concern is if the 230 cid block is just as strong as the 250 cid block?
Is the casting on 250 cid blocks stronger?
Has anyone rebuilt a 230 cid into 250 cid? | | |
#79954 07/13/2007 4:39 AM | Joined: Feb 2004 Posts: 29,838 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,838 | The only difference in the 230 and 250 is the length of the stroke, so just bolt the 250 rotating assembly into the 230 block. If you want to build in a little more power while you're in the process of assembling the engine, swap the dish-top pistons for a set of 307 V-8 flattop pistons. They're a bolt-in swap with no modifications. I've built several warmed-over 250's that way.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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