Dizzy Question

[school boy]

Long story short I bought a Summit small cap distributor after figuring out a large cap hei unit wouldn't work (hit the manifold). Sold the stand alone fuel injection and now have the option to use the GM hei I bought. Its used but in great shape. The only issue I have with the summit one is the remote coil. Heres a link:
http://www.summitracing.com/parts/sum-850055/overview/
Motor is a sbc 400, .030 over with ported 113 aluminum heads, LT4 hotcam (218/228 @50 roller cam), 10.1 to 1 compression and should never see above 5600-5700 rpms.
Reliability is what im after, this is why im asking opinions since the hei is in most cases dead reliable.

[GRADYS Performance]

You would need an ignition control box to go along with that aftermarket distributor. The HEI is self contained. Both are very reliable with the magnetic pickup style triggering.