effectiveness of acid washing the block surface is dependent on how much the block was decked. this may or may not be useful.
as for 'other methods' of verification, a Stage 1 would certainly have the oversized valves. you just have to pull a head to inspect them. there are other parts which are specific to Stage cars which are external to the engine assembly. for instance, only certain transmission codes will be behind a Stage engine.
the VIN can be somewhat useful. for this year it will tell you whether or not your car is actually a GS. if your car is a convertible it MUST have been built in Flint to have been an OEM Stage car. if a hardtop, it could have been built in any of three plants: Flint, Framingham Mass or Fremont Cali.
http://www.stage1registry.com/stage1info.html
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Vladimir Lenin
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)
Bookmarks