[Spridgets] Blanking sleeve and blocked bypass again...

[Dave Yealy]

Instead of the blanking sleeve you could make a disc out of a 
piece/disc of aluminium the same outside diameter of the thermostat 
and drill a 5/8" hole in the center, just make sure the disc is thick 
enough to fit snug. Remove thermostat and insert the disc. We do this 
in all the race engines we rebuild. Some of them we have to fiddle 
with the center hole size but we use the 5/8" as a starting point. 
You may have to change the size for winter and summer driving. Most 
of the heads have the bypass plugged.

Dave