I am looking at a C4OE6015F engine. Mustangtek has this listed as a HIPO block, and unlinke other HIPO blocks (65+), there is no other applcations (other than HIPO) listed. Are all of these blocks HIPO?
64.5 Block
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The general wisdom is that the hipo block is the exact same casting as the non-hipo block.
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General theory is that all 5 BOLT HiPo blocks were stamped with a sequential number on the square block boss - drivers side rear of block near where the clutch pivot is. You can find details & photos of this by searching this site.
Most (but maybe not all) Mustang HiPo blocks were VIN stamped but only if they actually went into a car.
Not sure if a Fairlane 5 bolt HiPo would have a VIN stamp - but would defintely have a sequential number according to posts here.
A Service block would probably not have been stamped at all.
Verifying a TRUE Hipo block is difficult - especially if a sequential number or K code VIN stamp doesn't exist. Regular 289 and HiPo 289 blocks are the same casting - HiPo's were just picked special somehow (no one is 100% sure) and machined with the larger main caps.
The heavy main caps can be added to any regular 289 block with proper machining. Doesn't make it a ture HiPo block or worth the same money.
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This is a two barrell block. Is there any chance a two barrell would have the hipo caps?
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The same block was used for 2 barrel and 4 barrel engines - only difference is the intake.
HiPos were only built with 4 barrel intakes.
Edited by - RalphJr on 02/19/2011 11:59:41
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And the hipos (with the 4 barrel intake) would be the only ones with the beefy main caps, for this year, right?
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