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By Brent - 6 Years Ago
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Hello,
a recent post states:
" There were no special Y-block truck blocks. Heavy-duty trucks with steel cranks used C1AE or C2AE blocks produced for both car and truck lines."
The last series blocks cast had special main web casting for particular use on the 292HD engine as this block would be used until the FT was introduced. The same casting was used on PASS CAR service as the 292 PASS CAR engine was being phased out and cost entered the picture. It was similar to FORD's later 105 391HD block casting being used in LT.
Does this suggest the C1 and C2 blocks are sturdier castings than in the '50s? I have a C2 and a B9, which would you guy's choose for your build?
Brent
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By charliemccraney - 6 Years Ago
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They have stronger mains than the '50s castings. For the average person, any Y-block will be strong enough. For extreme builds, the stronger mains are desirable. I'm assuming yours will be average, so use the one that is in the best condition.
Just saw that you plan for 350hp in another thread. Any block will handle that just fine.
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By LordMrFord - 6 Years Ago
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Rpm's and unbalanced cranks kill blocks....and boost.
2-4 mains crack upward to camline.
Y-Block's block one of the most strongest cast iron stock small blocks.
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By NoShortcuts - 6 Years Ago
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Brent. Charlie and Lord Mr. Ford are both giving you good information.
The mid-year 1959 change in FoMoCo y-block engine production was significant. The engineers decided that the length of crankshaft main cap bolts needed to be increased. B9AE, C1AE, and C2AE engine blocks have the benefit of the longer main cap bolts that you want to use.
As Charlie suggested, earlier y-blocks are okay to use, but consider modifying the depth of the main cap bolt holes per John Mummert's recommendation and information. Click the link below for JM's web site info on how to accomplish the main cap bolt hole depth modifications:
http://www.ford-y-block.com/ARPmaininstall.htm
Regarding engine rebuilds whether they be dead stock or modified, seriously consider having the complete engine rotating assembly balanced. FoMoCo original factory y-block production balancing work can likely be improved upon. IF you have used replacement parts like pistons or connecting rods, the original assembly balance has likely been compromised. Balancing the assembly will insure smoother engine operation and longer operating life.
Hope this helps! 
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