Hello,
I had some of the same problems when I converted my 78 cj7 to a Chevy v8. I am a machinist and a welder , but I couldn't configure a set-up to work in the close confines of that area. I am also using fenderwell headers.
I ended up using a hydraulic set-up. You can get a Wilwood slave cylinder (pull type), a Wilwood master cylinder ( girling type) , and a steel-braided line kit (usually a Long-acre brand ) for about $135.
It is really cheap compared to having to rig up the mechanical linkage. With the mechanical linkage, it may bind if you get a lot of body flex, or could loose clutch travel.
With my old stock set-up I made a stainless z-bar linkage that was adjustable , and it had the captive-spherical-ball-end bearings to allow for twist and misalignment. When I went to the 350 chevy it changes all of that.
By the way on that stainless braided line, get the 36". It will have about 8" of hard line, and will give more room to route .
Check with some of the suppliers for circle track racing to get a good deal. Tell them what you are going to do, because some of the master cylinders won't work with clutch-slave cylinders.
Hope this helps, I had to spend a lot of time sorting out and researching this to get it to work correctly. I want to save others from the trouble I had to go through. If you want the part #'s and the place I ordered from
send me a message and I will send them to you. I alos have some short-cuts for bleeding the cylinders.
LAter,
Jackal 8) 8) 8)