I had been using a MSD 6AL for the last 2 years with less than good results. I have experienced total breakdown in August 2 years in a row after running the car for an hour plus in 90 degree+ heat. The car was shut off and would not restart. After spaeking to MSD at length they decided to replace the unit (no charge customer goodwill) with a NEW 6430 Nascar box whose chassis is totally covered with epoxy, 6 pin weathertight connector etc. etc. My plan was to buy a second box and install a switch between the 2 in case of failure. MSD talked me out of that substituting the box instead. I know the Nascar guys suffer failure using this box as well so I'm not sure if I'm going forward or backwards. Finally my question is I beleive the box gets "heat soaked" in its current location (on a manufactured plate under the stock plate that houses the starter relay, voltage regulator, coil etc. on the engine compartment firewall) and was wondering where others have mounted their units? I run a single plane intake which really loads up the plugs at cruises and low speeds without the MSD. I love the MSD when it runs I just hate the lack of dependability so far and the cost of towing and damage caused by the towers. Thanking all who respond.
GEORGE
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