Anyone tried one of these HEI Distributors?

Has anyone tried one of these HEI distributors on a small block mopar? The prices seem really good. The more expensive unit claims to allow adjustment of the mechanical advance.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370543598991&category=33690&_trksid=p5197.c0.m619

http://www.ebay.com/itm/390293828615?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

I like the idea of eliminating the later model transistor box and wires that don't belong under the hood of my 65. I get the irony here, but at least the non-stock stuff is combined in one spot and sort of hidden back by the firewall.

Here are some questions:

What coil would I need? Preferably something round that will fit in the standard coil mounting bracket.

Do I need different spark plugs to handle/take advantage of the hotter spark?

What would I gap the plugs to?

What spark plug wires? Maybe a kit to make them to length. Seems most early mopars have straight boots on the spark plug end, and the spark plugs are fatter than on a chevy.

I sent these questions to the eBay sellers. I will post here if I get a response.