To run guide plates you have to have a stud that has a nut built into the body since that is the part that holds the guideplate securely in place. I have attached a picture if you look closely you can just see the nut under the rocker holding the guideplate in place...
Also I keep referring to it as a nut but it is really built in as part of the stud....
On the valve front you can actually get "ford" valves in the 1.94/1.6 sizes the biggest difference is they have a .05 longer tip for used with the early style rail type rockers.
As far as gaskets are concerned I would go ahead and buy just a cheap set of the Mr. gaskets that way if they get damaged during the process it won't hurt the pocket book.... and then when you are ready to bolt it all together get some good ones... fel-pros, percys, or actually I have had good luck with the hooker header gasket that comes with the super comp 351w fox body swap headers they are a real thick ceramic type, you have to trim them a little because those headers bolt on a little different they have a adaptor plate in between the header and head so the extra holes can be trimmed off.