KRAIG, KENDELL - I just Zip-tie'd the short cord from My magnetic heater to the tie rod on the 72 so I wouldn't loose it. My K321 in the 72 now has a cast iron oil pan but there's nothing flat enough for the heater to stick to securely. The K321 came out of a 147.
If I need to run anything and it's bitterly cold like this AM I just aim the 100,000 BTU kerosene torpedo Redi-Heater at the engine from 8-10 feet away for 10-20 minutes. The Super H and the pickup that has to be moved outside to get the Super H out to push snow both have block heaters. I have a timer for the heater on the truck, run it for 3-4 hours and it starts like it's 90 degrees out, The cord on the heater on the SH gets hot so I never leave it running unattended. 20 years ago I had a 1500W block heater on My 300-6 in My 1987 F-150 I used to plug in every night when it was real cold out. One morning I jumped in the truck to start it inside the shop and it cranked over R-e-a-l slow but started anyhow. I got out to unplug the heater and two burned ends of the cords, the one for the heater and the end of the extension cord laid there in a pile of charred debris. Lucky I didn't loose the truck, the 72 & 129, and ALL my shop tools that night. Other than letting the truck run on the timer while plugged into a GFI protected outlet I never let block heaters run unattended now. I also wire-brush the contacts on the plugs every year so there's no corrosion for better contact and less heat. Plus the truck's plug has a cover to protect it when not plugged in and I hide the plug behind the bumper.