Inliners International Forums General Discussion Engines Flexplate bolts

There are high torque & low torque starters (being stock type)

If you buy an aftermarket light weight starter,they usually will work on both flexplates 168 & 153 tooth.
Example:
http://www.speedwaymotors.com/Speedway-Lightweight-Starter-for-S-B-Chevy,2400.html

Take your time drilling,center punch it first,(use your new flexplate to mark where to drill new holes)then use smaller drill bits & work your way up to the final size.

MBHD