Hot Rods Speedway Motors flywheel

It's been a year now that I ordered my 91015629 Speedway 8BA flywheel. Having passed through the mock up period it was time to install the clutch and pressure plate. It was then that I discovered the pressure plate mounting bolt holes in the flywheel are threaded M8X1.25 rather than the 5/16-18 I expected.
I called Speedway to ask what the recommended attachment bolts were. They had no idea what to use on "their" flywheel.
ARP 108-2201 appears that it may work. Before I proceed, has anyone encountered this? And how did you deal with it? And yes the mounting holes are definitely threaded metric 8X1.25. Ron

 

Metric anything on a flathead is just plain WRONG!!!!!

 

How about calling Fastenal or McMaster-Carr and see what they recommend. Ace hardware also has a phenomenal selection of fasteners.

 

But it's not a plane it's a car. Ron

 

Possible.
The actual pressure plate mounting bolts (metric included) have a shoulder that indexes the pressure plate correctly to the flywheel. Ron

 

I fixed it. Thanks.

 

Those metric fasteners will be fine, only the thread is slightly finer than U.S. Std.
1.25 thread pitch on 8mm bolt diameter is very close to 5/16" U.S.S.
Rest assured that the manufacturer has matched the shoulder section of the shank with the diameter/bore depth for these bolts.

 

Mike, not sure I follow you. Which metric bolts are you referring to? Perhaps the ARP 108-2201. Appreciate the response. Ron