5/16 torque converter bolts Too short with SFI flex plate

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Heywodja

The Heartbeat Stops Here
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I have a PTC converter for my 904 lockup and it came with 5/16 flexplate bolts. However I am using an Sfi flex plate which is substantially thicker than the normal mopar piece. I’m finding that the flexplate bolts do not have enough thread engagement to properly clamp down into the pads on the Flexplate. Does anyone know if there are any longer links flexplate bolts available thanks. There is about .450 of thread length on the current bolts
 
Have you tried contacting PTC about the issue?
You could try some longer grade 8 bolts, but you may have to shave the heads for clearance... but don't go too long or you could puncture the torque convertor.
 
There are some Ford applications that have 5/16 converter bolts. Though most of their factory applications used studs, a lot of their aftermarket counterparts used bolts, so you might try a Ford application.
 
Have you tried contacting PTC about the issue?
You could try some longer grade 8 bolts, but you may have to shave the heads for clearance... but don't go too long or you could puncture the torque convertor.

not really too keen on them right now.. they are very slow to help. They foobar’d my first converter with the rong engagement for the input shaft, rebuilt the already new converter with the correct parts, then after looking at the pads on the converter they were not new to begin with, turns out they reused that part of the housing from an old trans..
 
There are some Ford applications that have 5/16 converter bolts. Though most of their factory applications used studs, a lot of their aftermarket counterparts used bolts, so you might try a Ford application.

Thanks I am at summit now, will look into that..
 
Problem solved:
I bought some three-quarter inch 5/16 bolts that I found at Summit that had a narrower head than normal and I ended up taking about four threads off the bolt which gave me a perfect depth and solve the problem
 
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