There is no such thing as a simple upgrade or a "bolt-on".
If you want a nice running "tame" motor you can't do any better then a stock "high compression" CJ engine.
The best thing you can do is go to a Australian 2v head with new valves.
If you insist on an aftermarket induction, get an Edelbrock 2v-4v performer. If you want the a double pumper Holley get the 750 and put an electronic choke on it.
Dial this all in and leave it alone.
Of course if you want more then I'll help you come over to the dark side. But there will be no going back. Heh, heh, heh.
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