1969 Dodge Dart Pro-Street 440

Ok scrap everything I said. I figured it out. Go to block layer.com there is a calculator that allows you to print templates of everything to build a house. One thing in there is cutting holes In a roof. Tell the calc what the pitch of the roof is and the size of the pipe and it will spit out a oval to print and trace and cut.

My dash was 30.5 degrees and gauges are 2.5 inches.

Print

Trace

Cut

Install!!!!

Headake over!!!!