This is where the real fun starts when you’re attempting to pull off a factory-appearing, Clevor-engine install. Years ago, an effort like this required making custom headers that fit Cleveland heads’ downward-angled exhaust ports and are compatible with a Fox-Mustang’s K-member/Clevor/transmission configuration. We went about looking for a viable (affordable) set of tubes for the unique application. With help from David Canfield of Trick Flow, we found what we were looking for in Hedman Hedders’ long-tubes, made specifically for installing 351 2V Cleveland engines in ’79-’93 Ponies (PN 85619/PN 85620 for 4V Cleveland heads). The headers feature 1-7⁄8-inch primary tubes that feed into unique flat-style, 3-inch collectors; when using a tubular K-member, the headers have more than enough clearance around a ’Stang’s manual transmission and bellhousing. A local exhaust shop fabricated a 3-inch, X-shaped crossover tube that mates with Flowmaster’s 3-inch after-cat exhaust kit.