Electronic ignition systems for TR6

[Greg Perry <rgperry@earthlink.net>]

Hello,

If one wanted to put an electrinic ignition system on thier TR6,  which system 
is the best overall?

petronix

Crane xr-700

Mallory distributor  4567801  unilite mechanical advance  - Jaguar with tach 
drive 58-74

Mallory distributor 4767801  unilite mechanical and vacume advance - Jaguar 
with tach drive 58-74

Will the Jaguar mallory distributors work in the TR6?  Are the above 
distributors + ground or - ground?

Others systems?

Any high or low points besides price?

Thanks,

Greg Perry