Hey Yellow Rose,
Have you seen these from TTI ? Specifically made for this chassis. With your tech expertise I'd like your opinion as I'm considering a similar project with an early a-body convertible.
header #636A
63-66 A-BODY 1-5/8" x 1-3/4" SMALL BLOCK STEP HEADERS
View attachment 1715746907View attachment 1715746908
FEATURES
Design: 63-66 A-body chassis
Primary tube size: 1-5/8" O.D.
Secondary tube size: 1-3/4" O.D.
Collector size: 3" with 3" 3-bolt flange.
Flanges: 3/8" thick, laser-cut, contoured for a leak free fit.
Material: Constructed of 16 gauge mild steel tubing. Mandrel bent on sophisticated computer controlled bending machines for precise fit and uninterrupted exhaust flow. The mandrel bending process maintains a constant inside diameter of the tube for a smoother finish with no restriction of flow and no crimping of the tubes.
Step design: Provides low-end response and top-end horsepower gain.
One piece design: One piece header tubes / No slip tubes.
Under chassis design: Above the steering center link design offers maximum header to ground clearance.
Full length header design: Proven power gain vs. shorty design.
Recommended for: 320-575 horsepower.
Header set includes: Header gaskets, 12 header bolts, header reducer adapters with 3-bolt
View attachment 1715746909
