Thanks for the comments everyone. As Geof rightly said it really doesn't matter because it's an experiment, it may turn out as simon's experience did with their stuff or like geof's mate, that's the nature of experimentation. If nothing else, good or bad, I'll know from direct experience if there is any merit in them at all.
The bits are already here to try it out so they are going on. I will however take Brents advice and have them pulled down first and checked. I will be asking a mate to do my work for me as he has done for years, he's spent decades building ford motors and I'm sure he wont sugar coat whatever he finds and I'm more than happy to share whatever comes with the forum. Thanks to David re the cam advice and yes you are right with regards that. I have no idea what's in it now but we'll assess it to see whats what.
Not sure when it will go together, all depends on my mates availability, hes working away at the moment. My (ametuer) observations so far is that it all looks reasonable, pretty dodgy die grinder work squaring up the exhaust ports. The intake valves are set right in to the roof of the combustion chamber and look bound to suffer shrouding to me (again I'm no expert though). The casting inside the ports isn't the worst I've seen though. Where the intake valve is cut in the material thickness where it has been cut into the sparkplug hole looks a bit light and I'm thinking might end up prone to cracking. lol perhaps a year is optimistic ;P
I'll try and post some photos too;
Cheers,
-Andy