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1967 Ford Mustang Engine Swap - How-To Convert From Six To Eight
In This Final Segment Of Our Six-Cylinder To V-8 Conversion, Our '67 Mustang Gets Its 289 Drivetrain
JMC Motorsports provided us with a used 8-inch rearend from a '68 Mustang, perfect for our swap. Used 8-inch cores are becoming harder to find. However, there are many sources. Currie Enterprises can build you a new 8-inch axle housing and differential. If used is more to your liking, check with Mustangs Etc. or Memory Lane Salvage for a rebuildable core.
Randy's Ring & Pinion provided us with a complete 3.55:1 ring-and-pinion rebuild kit, including bearings, seals, gaskets, O-ring, shims, and more. We enlisted the help of Jason Hughes of Hughes Differential Systems in San Diego to freshen up our tired 8-inch chunk. When Jason knocked the differential apart, he found 3.55:1 gears and a peg-leg arrangement that was rebuilt not long ago. He saved the gears for another project and built our differential with a new limited-slip and 3.55:1 gears from Randy's.