Slant six headers and 2 or 4bbl intake

There are no commercially made headers that fit an early A with the 170 engine. To make Clifford shorties fit, the front 3 tubes must be sectioned shorter to make them clear the manual steering box. This is because the 170 is a low deck and not as tall as the 225. Another option is to use a Dutra manifold on the front with a modified rear manifold. I Cannot remember if a pair of Dutras will work on a 170. The Offy 4 barrel fit the 170 without issues if a stock (or the modified exhaust manifold) is used. The Clifford 4 barrel is used with headers.