We have an overstock in 4/7 swap flat tappet cores for SB Chevy engines. Both Hydraulic and Mechanical
For a limited time, we are offering the 4/7 swap upgrade at no additional cost.
To receive a cam recommendation, and price quote, just fill out the appropriate cam recommendation form.
Make sure to request the 4/7 swap firing order, in the "Comments" box
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Tractor Pull: http://jonescams.com/tractor-pull/
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