You will have to move to the numbered bits. or machinists bits. Very helpfull on carburetors. Here s a chinese set i purchases. Average chinese quality. So mic the bit for sizing before you use them. I had to return my first set of another brand. The first 4 bits were's all the same size.
http://www.ebay.com/itm/61-80-MICRO-...item4ab6500f81
I use an aluminum plug for easy'er drilling. Some will freek about dissimilar metals. But in the grand scheme, the aluminum plug install will out last the build.
If using a steel plug, pre drill thru 80% of the plug with a larger, more durable bit. Then finish with the .030 or .025 bit.
__________________
Bull Nose Formula-461, 6x-4, Q-jet, HEI, TH400, 8.5 3.08, superslowjunk
Last edited by Blued and Painted; 07-23-2015 at 11:15 AM.
|