holley proform bodies
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holley proform bodies

  1. #1
    Senior Member 1975sleekcraft's Avatar
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    Default holley proform bodies

    can anybody explain how you can take a 650 holley, buy an 850 proform body, and it becomes an 850???????????

    these kits dont come with bigger butterflies....(or do they)???

    as far as i can see------bigger venturies, same throttle plate?????? = bigger carb?????

    please help???

    trying to make up my mind on what and which carb to buy, or upgrade mine??
    thanx for any and all help!

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    Quote Originally Posted by 1975sleekcraft View Post
    can anybody explain how you can take a 650 holley, buy an 850 proform body, and it becomes an 850???????????

    these kits dont come with bigger butterflies....(or do they)???

    as far as i can see------bigger venturies, same throttle plate?????? = bigger carb?????

    please help???

    trying to make up my mind on what and which carb to buy, or upgrade mine??
    thanx for any and all help!
    i dont know the answer to ur ???, but, i do know that people have taken the 660's & put the 850 base plate on them & made them work fine...depending on ur application (motor, usage, etc), i would either upgrade the 650, especially if its a DP mech sec or shop for a 700DP or 750DP mech sec...both work fine on stock to mild motors...i have a 650DP mech sec modified by myself on a Edel air gap manif on a mild BBC 427 that works pretty damn good for my purpose...just my .02 cents

    FastRat

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    Senior Member OUTLAW HALLETT's Avatar
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    as far as i know , they wont ,, you can go from a 650 to a 750 with just the bodie change,, the way it works is the baseplates are the same on both, if you look at the top of a 650 bore compaired to the bottom , you can see the it is different, the bore it tappered,, on the 750 it is the same all the way through ,, i just put 750 hp bodies on my old 650s

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    Senior Member flat screwd's Avatar
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    Yes but what about the emoulsion tubes in the metering blocks? Wouldnt they have to be changed too?

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    Senior Member Widetrack's Avatar
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    Quote Originally Posted by 1975sleekcraft View Post
    can anybody explain how you can take a 650 holley, buy an 850 proform body, and it becomes an 850???????????

    these kits dont come with bigger butterflies....(or do they)???

    as far as i can see------bigger venturies, same throttle plate?????? = bigger carb?????

    please help???

    trying to make up my mind on what and which carb to buy, or upgrade mine??
    thanx for any and all help!
    I know it is cheaper to change bodys out but IMO you should look for a new 750 Holley stright out of the box! Problem solved! WT


    SOMEONE SAID YOU CAN'T TAKE IT WITH YOU! SO,IM BURNING IT UP ONE GALLON AT A TIME!
    WT

    WFL Crew!!!

  8. #6
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    Corndog just did Holley's kit to upgrade his 650 DP to 750s. Paid $135 a kit. Says it works very well. Has all gaskets and needed parts

  9. #7
    NW Spectraholic Malcolm's Avatar
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    The standard DPers use the same throttle plate, so yeah it's all in the main body.
    Malcolm

    75 Spectra 18
    77 Spectra 19 project

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