Simple answer is yes. Ether will wash down the cylinder walls and cause low/no compression. It is very volatile and if buildup happens and you get a spark it can/will blow the top out of a piston. Do people use it? Yes. Do they have success? Yes. Are they working on borrowed time? Probably. JMO
I just noticed you are using a Edlebrock 1406. I've had 2 of those go bad after a year or so. Don't know why, I'm an inpatient guy so I just swapped them out. Replaced with Holley and problems went away.
BTW, bartamos is quite helpful but can come off a bit abrasive if he feels the poster is not following his advise to the letter. He really is a good guy!
