I ran my 84 (and then swapped into an 82 4wd for many thousands of miles 300,000+) with a push button feeding 12v direct to Gplugs without any issues. One finally quit in the second truck at about 500,000 miles, but I wasn't complaining...It still would start, just missed for a minute or so if below 45 degrees or so. Found one somewhere of a wreck and installed it...good to go, again. All working when sold at almost 600,000 miles. Two turbo journal bearings (used dino GAS oil and carboned up drain, like a dass)!, starter rebuilt brushes twice, a new clutch, adjusted valves once, timing belt once (but still looked new at 275,000 miles! yes I was stupid (and bad broke back then)!, scarest was oil sender blew the top off itself and I happened to look down at the gauge (in console, had buckets as a Sport truck model) and saw NADA! stopped in time, not empty/low enough to ruin engine THANKFULLY!! STopped up sender, refilled 3 qts oil, and drove to parts house for new sender! All good! Maybe an alternator..or just diodes, I think, from reversing jumper cables! ANyways bulletproof and amazingly economy!