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Old 02-19-2001, 07:23 PM   #1
BennyBoy
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Question

That is kind of weird how it would make that much of a difference in performance, but cars are weird like that sometimes.

I am planning on swapping my 8" rear out for a 9" with posi (Any posi unit advisable? I know the Detroit Locker is the best but it is expensive.) and 3.89s. With the power I'm making, should I go to the 9" or would the 8" be strong enough to handle the torque and power of my engine for quite awhile? I plan on getting the Performer RPM heads sooner or later too so keep that in mind. Thanks.

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'69 Coupe with 351W
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Edelbrock Performer-RPM intake manifold, Edelbrock Performer-RPM cam, Edelbrock lifters, Edelbrock 750 cfm carb, Accel coil, Moroso Blue-Max spark plug wires, Hedman headers, 2 1/2" pipe, glasspacks, Edelbrock double roller timing chain, Edelbrock valve springs, Flex fan, C4, Lakewood traction bars, 3:1 open rear-9" 3.89:1 posi coming this summer
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