70 mustang question?

Any decent set of headers will interfere with the steering ram on a PS car. All you need is the drop bracket for like $25-30. No big deal.

Well seeing as the Boss cars pretty much came from the factory with 235/60's all around, I would say that those will fit, depending on the wheel diameter (they were 14" from the factory). Hell I had 295/50 15's on the rear of my '69 till I punched a hole in one.

I wouldn't try a 17x8 in front.

A 17x 8 will work fine on the front. Just pay attention to the backspacing of the wheel.

Here's a wheel and tire chart for '69-'70:

I have 235/45-17's on 17 x 8's front and rear on a '65 with rolled fender lips all around. A '70's wheelhouses are much bigger, so you might not need to roll the fenders. My rims have a 5.0 back space. It's better to go with too much BS and use a spacer to move the wheel out (I have to run a 7/32" on the fronts), than to have too little. There's nothing you can do about too little, other than flare the fenders.

I have hedman hedders full-lengths (I believe they're 1 5/8 primaries) on a '70 Cougar with a 351 Cleveland with 2v heads, and needed no PS ram mount extender. But a Windsor might be apples and oranges. Like Scott said, the worst that can happen is you need to add the extender later.

180 Out

Sept or Oct issue of Mustang Monthly has all the info you need. Sizes, widths, backspacings, etc.