what don't you start a survey on what spacers evryone is usuing and if they have any dyno sheets........also like if it is a 1 inch spacer 1 1/2 or 2 inch spacer, open hole, four hole,tapered,,......small block or big block ets.
As i think spacers r flooding the market and lots are copy cats and lots are junk........so if we can save a guy a headache from buying a bunch of junk why not.............just a thought