318 wont rev above 5,300

CUUDAK said
A stock ignition will survive 5500 rpm as well as a stock pump. Been there done that.

The springs are more than likely the same chinese **** as the cam so there too could be a problem.

It is still in his best interest to get rid of the 3.91 gear! TOOOO much gear for the turbo!

True, but you'll have to close the plug gap some to make sure that it can still bridge the gap under the higher cylinder pressure with boost. A good coil and ignition box helps curb that problem.