MM UB puller options

mmkid · Sep 25, 2021

Wanting to build a UB I have out back. Will a stock
403 with say Z or 10 heads give it enough power
To pull 55-6500 6 mph? Thanks

Tony in SD · Sep 25, 2021

As I recall, Z heads are way different than UB heads. The Zs have side mount heads and th UB have overhead split heads.

VicS · Sep 25, 2021

Depends on where you live. Here in the Midwest with clay tracks and shorter chains. It takes 800 blocks with 5.5 bore and 7 stroke. 711 cu. At least find 800 blocks and heads. And make your manifolds. Or go on a diet and get to 4500 lb. Or do both. There are quite a few 600 plus cu. RD 460 Internationals out there pulling 6 mph and 1000 Plus cu. John Deeres.

mmfan55 · Sep 25, 2021

I think the reference is to the casting number GE 30Z. Same as 10A4210 in compression.

mmfan55 · Sep 25, 2021

As Vic said, depends on where you pull. Will likely do 4mph, not likely 6. That is with 18.4x38 or 34 tires.

MM UB puller options

mmkid

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Tony in SD

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VicS

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mmfan55

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mmfan55

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