454 - use 473328 or peanut heads ?? - Team Camaro Tech
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post #1 of 6 (permalink) Old Jul 10th, 09, 09:38 AM Thread Starter
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Mark
 
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Location: Janesville, WI
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454 - use 473328 or peanut heads ??

I recently inherited another 454. Got it at a good HOT ROD price, the kind of price you only read about in magazines, FREE.!! Ive done some research and heres what I have, which leads me then to a couple of questions.

Heads 473328.....68-69...oval...OPEN...366T 68-85 2.06/1.77 Open chamber Oval port
Block 361959.....454.......73-90...2 or 4 bolt

I am unsure yet if it is a 2 or 4 yet, as I just pulled it last night. I plan to run this block for a year or two till I get the cash to go for a bigger build. Which will include aftermarket heads, however its not in the budget currently.

The reason this motor was pulled was it was lacking power, and oil pressure was 30 when started and would gradually work its way down to 0-10 (stock gauge) when it warmed up. 5 exhaust lobes have been wiped flat. Resulting in the power loss. It was backfiring thru the carb upon acceleration. Do you think the main bearings will be alright? There wasn’t any noise from the bottom end. Several of the lifters were up to ¼ inch loose.

What kind of compression might this be yielding with these heads?

I have a set of peanut heads off another 454 as well, which ones do I go with?

What kind off cam would you recomend?

Thanks

Mark
Long Gone: 1984 Z28, 1989 RS
Current : 1967 Coupe w/350, 2010 2SS

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post #2 of 6 (permalink) Old Jul 10th, 09, 11:44 AM
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Fred
 
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Re: 454 - use 473328 or peanut heads ??

It's wore out. Just the flat cam means a rebuild is needed. And the mains are probably shot with that low oil pressure. Sorry, free hardly ever is.

One owner 69 Camaro,(yep, bought it new
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post #3 of 6 (permalink) Old Jul 10th, 09, 03:59 PM
 
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Re: 454 - use 473328 or peanut heads ??

Well, at least you didn't pay $300 for a good core like I did, b/c that's what you and I got!

And I thought long and hard and turned my 454 core engine into a 496! And if you do, install at least 1/4" longer rods!

pdq67



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post #4 of 6 (permalink) Old Jul 10th, 09, 05:22 PM Thread Starter
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Mark
 
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Re: 454 - use 473328 or peanut heads ??

Yea, a 496 is plan B. I am hoping that I can salvage it and run it for a while, but I know the chances are slim. Are these 366 heads worth anything, powerwise.?? I know they are the bottom of the ladder, but how about stacked up against the peanuts.??

Mark
Long Gone: 1984 Z28, 1989 RS
Current : 1967 Coupe w/350, 2010 2SS

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post #5 of 6 (permalink) Old Jul 10th, 09, 11:12 PM Thread Starter
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Mark
 
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Re: 454 - use 473328 or peanut heads ??

I tore into it tonight and found that it was a two bolt block. Several lobes on the cam had been ground almost flat. I found some sludgy silver looking oil at the bottom which I immagine was the remnants of the cam. Also found a rivit-like stud and thin washer lodged it the pickup of the oil pump.

So on a learning note for this shade tree mechanic. Why would the motor start with 30 psi and then proceed to lose oil pressure as it warmed up.? Bearing clearances too large and oil thins out when it warms causing the lose in PSI? Trying to suck up th sluddgy oil?

Looks like either way im in for a build.

Mark
Long Gone: 1984 Z28, 1989 RS
Current : 1967 Coupe w/350, 2010 2SS

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post #6 of 6 (permalink) Old Jul 11th, 09, 01:33 PM
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Dante'
 
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Re: 454 - use 473328 or peanut heads ??

Get a set of 781 or 049 chevy heads. These were the best flowing oval port heads.

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