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  #1  
Old 06-07-2021, 11:08 AM
Lifetime Goat's Avatar
Lifetime Goat Lifetime Goat is offline
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Default Can someone share the correct crank pulley for an ATI damper that matches stock size?

I have an ATI 3 hole damper with a 4.5" pulley and 1/2" spacer which is just not turning the fan and water pump as much as I need. Stock crank pulley is 7.25" and I was wondering if someone has figured out what the easiest swap is to remedy this?

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1971 GTO Convertible 455 #64 Heads, HO intake and carb with MSD HEI, RAIII exhaust manifolds and 3:55 posi
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Old 06-07-2021, 01:12 PM
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TinInjun TinInjun is offline
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https://www.ramairrestoration.com/pu...-6-25-dia.html

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Old 06-07-2021, 01:26 PM
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Can't I use a BBC pulley or is the backspacing different?

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1971 GTO Convertible 455 #64 Heads, HO intake and carb with MSD HEI, RAIII exhaust manifolds and 3:55 posi
  #4  
Old 06-07-2021, 05:03 PM
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Skip Fix Skip Fix is offline
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I have a RARE drilled for 3 and 4 holes on my ATI balancer on my IA motor.

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1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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