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After seeing a stock 360 block at Bob Georges that had the extra two bolts added I wouldn't even do it if someone offered to do it for free. It still gives me a good laugh.



That's the point,it's wortlhless on a stock webbed block.There is no material to hold the bolts and sometime adding the 3/8 outer bolt can crack the block webbing.I used the four bolt caps on another block with out using the bolts and that engine ran 9.50s with no issues.



Same issue trying to do it to a stock 440 block. Just not enough meat there to do any good.

I went along with my machinists opinion, which was opposite the above - over 600HP on a stock block he suggested it along with a filled block, forged rotating assembly. He was not a fan of girdles for sm blks based on what was available. As I said, I only have about 16 runs on it so the verdict is still out IMO. Screamed it up to 7700 once and 7500 several times. Have since switched to different gears as I was running out of motor too soon - obviously .

Fastest 300