early A-BODY 1-5/8" x 1-3/4" SMALL BLOCK STEP HEADERS

" REVIEWS "
TTI Header #636A

Especially made to fit the 63-66 A-BODY dart valiant barracuda .
1-5/8" x 1-3/4" SMALL BLOCK STEP HEADERS 3" collector with 3/8" head flange thickness.
Has anyone install these headers on early A bodys? If so , what are your opinions on fit and performance ?