do my xf up

hey guys. i need help i wanna do my xf up too look sound and go good but price is an issue (i know im dumb) but if you guys could give me a push in the right direction that would be cool. its a in line 4.1 carby manual 86mdl

p.s if you know of any xf enthusiast sights that would be cool too
i know i spelt that wrong.

I just bought an xf and am thinking of putting a later model ford 6 cylinder in from an EL, it is a 4 litre over head cam engine.
check out this site
http://www.autospeed.com/cms/article.html?&A=0249