Carb Choice, Single Holley or Dual Webber? Options

[Pnambic]

Going through my parts pile, I've found what I think are complete (but only partly assembled) carb setups for both Dual Webbers (40 IDF) and a single Holley (don't know what model...how do I tell? There's a "D-3" on the side).

Purchased the parts with a non-running '73 a few months ago along with both trunks full of extra bits and parts.

Which would you suggest I use?
Which is more reliable?
What is the Holley better at?
What are the Webbers better at?

It'll be going on a 1.7 and I'm not going to be racing it or anything, so an extra coupla HP is less important to me than reliability and availability of replacement parts. But a few extra horsepower are always welcome!

The way they look, I'll need to get a kit to rebuild either setup, so I need to know which one to go for before I buy the kit.

What do you think?

Thanks in advance!!

[TheCabinetmaker]

Without checking my book, I think the HolleyD3 is a 34 Idf made under license. Not much in the performance department, but will reach 35 mpg. The Dual 40's would be a better choice.