AC 700R4 Muscle & Classic Car Parts

The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Here's what you need to know about GM's famous 4-speed automatic.

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

Follow along as Jeff installs an early 700R4 transmission for the big block in his 1967 Chevelle. See how this unit is upgraded and converted to a later 30 spline style.

We show you how to keep that old GM transmission when swapping in an LS engine. Our LS swap adapter kits make it easy!

Who gets your pick as the best manufacturer from the golden age of the muscle car wars?

If you had to pick only one-is it a hot rod or a muscle car?

There's something special about your first car. Here are a few from the Speedway Motors team.

If you're ready to swap an LS engine into you '73-'87 Squarebody Chevy or GMC truck, here's a guide to get you started and a parts list to help you get everything you need for your swap.

I'm sorry to have to tell you this, but the '64 GTO was not the first muscle car.

Learn a few tips on how to properly mount Modified bodies and some products that will help get your race car body fabrication job done!