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70white402

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Posts posted by 70white402

    70 chevelle chrome valve covers

    in Restorers

    Posted

    Are the 70 chevelle big block chrome valve covers the same as 70 Monte 402/454 steel valve covers?  Want to put some bling on the engine compartment. My buddy just sent 20 original valve covers out to be flashed chromed. They’re perfect.

    engine decode

    in Engine Tech

    Posted

    On 2/2/2024 at 7:59 PM, Dtret said:

    Check down on the block by the oil filter and see if a v.i. number is stamped. 

    My vin is stamped by the oil filter. Sept 69 build

    • Like 1

    Tire size

    in General 70-72 Monte Carlo Forum

    Posted

    6 hours ago, MCfan said:

    Jeff, you are correct, even a G70-15 would be moved 1.3" further outboard (see first illustration below). Here's some numbers and illustrations to back up what others have said and you have also concluded about those wheels on the rear of a first gen Monte.

    A stock rally wheel is a 7x15 with 4.3" backspace (+8mm offset). The wheel you mentioned is an 8.5x15 with -25mm offset. The difference in positioning of the tire/wheel combo is 8 + 25 = 33mm or 1.3" further outboard with a G70-15 equivalent tire.

    If you were to consider running a larger tire on the rear, such as a 275/60-15 (which many of us currently run), it gets even worse with 2.45" of reduced outboard clearance compared to a stock rally wheel/G70-15 tire combo.(see second illustration below)

    If you were to compare a 275/60-15 on your proposed wheel to something we all know works, a 275/60-15 on an 8x15 wheel with 5" backspace (+12mm offeset), you can see it would still have 1.46" less outboard clearance. (see third illustration below) The current outboard clearance with the known combo is right at .75" without trimming the wheel well lip so I seriously doubt it could fit even if the wheel well lip was completely trimmed off.

    All illustrations were produced by the Tiresize.com Wheel Offset Calculaton

    Tiresize Offset comparisons.pdfTiresize Offset comparisons.pdf 195.25 kB · 6 downloads

    Thanks dennis

    Exhaust Set-up: 454 with stock manifolds

    in Engine Tech

    Posted

    15 hours ago, jft69z said:

    Funny you mention that Mark. My first thought was to suggest Extrude Hone 🙂. That, and maybe a little exhaust port matching, but for something that sounds like a stock rebuild, it would probably net you about 0.5 horsepower. Certainly not worth the expense & why I said clean them up and go.

    I think Holley/Hooker has some cast iron type manifolds out there that may have some flow benefits, but no personal experience. 

    EDIT: I just looked on the Holley/Hooker site. It appears they don't have anything for Big Block Chevy. Just small block, LS/LT swaps, some Fords, etc.

    I don't know if LS6 Chevelle manifolds are different than the LS5, but someone here will have the answer to that. Maybe they were bigger/flowed better because of the higher horsepower?

    Same manifolds. No difference.

    • Thank You! 1

    70 monte

    in General 70-72 Monte Carlo Forum

    Posted

    On 12/31/2023 at 5:19 PM, shawns said:

    I just bought a 70 triple black 402 4 speed, but how do I know for sure it's true 4 speed car coming from flint 4th month of 1970?

    Shaun, I think you would look better in a camaro and should sell the Monte to me.  I have heated garages to keep her safe and warm.  Jeff in nj

    • Haha 2
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