I do not think that would matter.
Check to make sure your thermostat is not upside down. The spring faces the engine on the 'hot' side.
Also make sure there are no air pockets in water jacket at the top of the engine. Are you using an coolant overflow tank (the kind with coolant in it) or are you relying on an airspace in the rad for expansion?
If it's the latter, is your rad a 'top to bottom' flow?
If yes, do you have at least 2-3 inches of airspace at the top of the rad?
If these are out-of-whack, the engine may be retaining air pockets around the heads and intake manifold, which can cause such temp fluctuations.
Maybe post a pic of the engine bay, if you can
