HEI Distributor - Coil on Cap

[jgalt_Winner-28]

I have this distributor on my 350 Mercruiser engines. What can I do to make this a safe part to use?

[fasteddy]

Use the coil cover and RTV all the gaps. Make sure you use the heat sink compound on the module. Use really good spark plug wires. Carry a spare and all the dinky little tools to change it. Expect spark fade above 4000rpms.