Voltage regulator

so im doing this same thing on my 68 barracuda. I'm rewiring the entire car with all new stuff, and eliminating the ammeter. I have a 70's square back alt. with the 2 isolated feeds. are those V/R's offered by summit any good?

whats with the "race only" unit?

http://www.summitracing.com/parts/DCC-3690731/

heres a vr125:
http://www.summitracing.com/parts/SMP-VR125/

and restoration unit:
http://www.summitracing.com/parts/DCC-4529794/

comments on any of those?

also, where do I get a NEW plug for these? I'd like a new one if they are available....

thanks.

-james