I realize that you probably do not want to be talked out of going to a carb, but let me tell you about my recent truck experiences.
I have a 98 5.7 Vortec, with the 'spider" injection. Runs well, gets reasonable mileage, starts easily, etc. etc.
I just bought a very low mileage, all original, mint condition 69 GMC, with a 350 Cu In, Quadrajet engine. A bit harder to start. Sometimes doesn't want to keep running right after start up Reasonable power, really, really bad gas mileage. And this after a professional tune up, with new cap, rotor, points, condenser, plugs, etc. Dwell and timing set with proper equipment, and had the heads and valves done as well.
Yes, the carb engine is easier to fix yourself, simple as hell, and very nostalgic. But, I often find myself wishing it had a good fuel injection and computer ignition system when I'm driving it, or when I'm buying gas for it.
On the 67--72 forum, there's lots of guys who have swapped in Vortecs, and even LS engines, for more power and better mileage.