The perimeter frame is a get-you-started perimeter frame which includes only the front and rear crossmembers.

SO-CAL has developed this affordable, Model A buggy-spring frame to get you started at the right price with the right product. The rectangular steel tube rails replicate the original Model A dimensions, however, weve upgraded the chassis and included many of the fine details developed on our 32 Step-Boxed™ chassis. The central K-member incorporates the brake pedal and master cylinder mounts as well as a transmission mount that accommodates a wide variety of transmissions. The frame also includes a Model A-style transverse leaf spring rear crossmember with beautifully stamped side components welded to a center strip and finished to the highest level of quality. The rear crossmember faithfully follows Model A dimensions.