they should, I have some similar on my 318 already. Only problem I have is that the driver side goes under and over the center link. Mine got pancaked, and now I replacing them with tight tube headers.
they'll fit...there not to bad,take oil filter off,mounts loose,and of course the center link.i pop mine apart at the pitman arm and let it hang down.they do hang low...
They are a pain to fit removed dist cap motor mounts jacked engine up as far as it would go. They do hang low, and I learned a whole new language when I was doing mine.
Done the La/a body cheap header dance. For budget the Hooker 5901 Comps fit way better,than the Flow techs.(Read ,easier to install) Run 1 3/4 Super Comps now. Drop in,in 30 minutes.Driver side,multi piece.
I ran those type of headers in my 68 barracuda with power brakes and power steering. Got them for 50 and then understood why they were so cheap.
The right side of the motor had to be shimmed up to clear the steering, the drivers side could go up but then would rub on the steering link, too low and they would rub the steering column coupler. Save your money and get a pair of Dougs or some shorty headers