You wouldn't get into a heck of a lot of trouble if you used the same guide spacing as for a 10 foot rod but the stripper guide would be 6 inches further away from you than is necessary. If you are 7 feet tall it wouldn't matter much.

If you will send me the distances tip top to each ferrule and tip top to where you want the stripper guide, I'll work out what I think would be ideal. I need also to know if its a "fast" "moderate" or "slow action...and if it has tip over butt or internal ferrules.
if its an internal ferrule model, I'd also need the distances to the top of the gap, and the bottom of the gap on all ferrules. All measurements to be made when the blanks are assembled. This can take me a little while so don't expect instant results.

Ol' Bill