C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old 04-16-2004, 07:33 PM
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MEGALADON
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Default 454 BB

HI PERF PASS, does this mean anything good, or of good value
when on the rear of the blocks. of the 454.
I also have a 396/375 hp factory stock, that saez this on the rear to,
but not sure what it came out of???
Old 04-16-2004, 07:43 PM
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Corey_68
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Default Re: 454 BB (MEGLADON)

Post some casting numbers to know what it came out of. I'm not sure if ALL (but many) high perf pass blocks were 4 bolt mains. At least mine is for that matter. :cheers:
Old 04-16-2004, 08:15 PM
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bence13_33
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Default Re: 454 BB (MEGLADON)

"Hi Perf Pass" isn't all that rare and doesn't mean it's a 4 bolt main block. My motor is also stamped "Hi Perf Pass" and it's a 2 bolt block. Were you able to find a casting number on the heads yet?
Old 04-17-2004, 02:25 PM
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MEGALADON
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Default Re: 454 BB (bence13_33)

I have not pulled anythingthing apart yet. I will wait till i get a complete gasket set. I found a nice 81 Z28, no motor or trans. I bought it today.
Instead of fooling with the vette and getting side tracked AGAIN, I will build a nice street car with this. :seeya

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