by cjbiagi » Sat Jan 14, 2017 10:39 pm
Not sure about 1 3/4" versions, only ones I know would be Hooker 2129's but these require front engine mounts and don't fit with some other accessories. I have run Hooker 2135's on my 355 for over 35 years (2 sets over that time) but they have 1 1/2" tubes and have been happy with them. They are great for most SBC street engines. Some guys run the Sanderson shorties, those might be 1 5/8"? Not positive on that. The smaller header pipes give greater low end torque and fit much better than a larger header will. Space is at a premium on these cars, not sure you would notice enough difference going to a 1 3/4" to be worth the hassle....
Clyde.........75 Monza 2+2