hard starts like you described, and an uneven idle right after starting, are typical of a fuel pressure problem. Not necessarily in acheiving it, but maintaining it. You're leaking fuel in one of three places; past an injector, through the regulator, or at the pump in the tank. The only place that would allow to leak down that fast is the regulator, but like I said, the pump will probably need to be replaced in the near future as well.
Once you are able to maintain pressure after the key is off (you should still have 10-15 pounds the next morning), cold starts are a breeze.
I have no idea who makes/made cartech.
It sounds like your steel braid got a little close to the header. Happens all the time. It shouldn't, but it does. As long as it's not leaking, don't sweat it.
Mobil 1 15-50 sounds excellent. Stay away from Fram filters, though. I personally love the Purolater One filters, but any Purolator or Wix filter is fine.
Did I show you any pics of the 308 I threw together last December? I'm still looking for a ride to put it in. I'm keeping my eye out for a '72 Pinto!
Take care,
~Chris