I have pics of the eng/carb I'd post if somebody wanted to see them (if I knew how:)
this truck starts easy and once warm idles smooth as silk...it's just that higer rev situation I was perplexed about...the leaking around the gasket is not bad visibly I just speculated it may have been messing with vacuum or mix...I can physically see my Vac advance function when I rev it and as I say once it's warm it's throttle response if you tweak it abruptly (you know as in vroom vroom real quick from idle:) is excellent...I know I have weak rings tho since it does burn some oil and still a bit of smoke when revved (not near as bad after the new head tho)...
the old thing is a cool old truck I enjoy driving...
irt this
<<< If you want FAST, you will need to buy a brand new F-150...WHAT, HUH, @#%&?$
Stuart >>>
remember I still have the other '67 C-10 with the 400 in it

it moves on down the road at a great clip...but I still haven't found those #'s to id it's eng

...
thanks as always guys...