Drilling mounting point in a Pro dart heads.

[skiboy_350]

Hi there, I have ford 408 stoker with a set of Pro 1 heads. My alternator pivot point is falling right in between the two exiting outer most point of the passenger side head.

Is it safe to drill there and add the mounting point I need? The exiting upper hole is 1" deep the bottom one is .7". How deep can I safely drill?

Thanks,

Jim

[malihoochie]

The end of that head is about half an inch thick. You could drill and tap where you say you need this other hole or you could use a different bracket with a more common pattern to it. The worst that can happen if you drill and tap the head is that you'd break through to water - in which case you just seal the threads on the bolt and remember to drain the radiator before pulling that bolt. Best of luck.

[Awesome Bill]

That would be it. You need to go no further, and use a bottoming tap to get the threads clean all the way down.