I just bought a set up off ebay it says "GETTING 1 PERTRONIX IGNITOR 1762LS LOBE SENSOR FOR THE NISSAN GQ PATROL WITH TB42 ENGINE" LS for lob sensing but further inb the description it says "Rotating cobalt magnets trigger a Hall Effect integrated circuit . ...no points to burn, ...no moving parts to wear out" it doesnt say anything about having to grinf the distributor shaft down, saw a post on another site saying "1762 (so I'm assuming it's not lobe sensing) and says the instructions that cam with that say "distributor must be removed from the car and a flange on the distributor shaft has to be Machined to 0.624 of an Inch"

Have I bought a lob sensing one as I hear they are not as reliably as the Hall effect type?

Also bought the Flame-ThrowerŪ 40,000 volt coil they recommend to go with the ignightor.. I've read to check the rivies are right as its a manufacturing oversight, but bottom line is have I bought the right one, and what is the difference between hall effect and lob sensing, as i said in the ebay description its says its both!!!!!