someone has...........................
'''''this was made to fit my vehicle as all ''bolts'' are not the same. ...... The different angles may make it easier to fab one up. made this to work w/ my 292 installed in my 51 3104 ''''' and a T5 hybrid (camaro gutz+S10 housing) tranny, so i could use all stock pedals.
also used a mr gasket bell crank for the throttle using the stock pedal to a lokar cable to an edelbrock 500. Along w/ this is an early corvette clutch arm 53-58 only so we could
get the clearance we needed because of the location of the 292 in situ.''''''

This fixture may not work w/ your 350 because of different angles. You'll have to fab your own so it fits your bolt.