I like those Ross pistons!!! Looks like valve reliefs specific to AMC. Are there two different part numbers so you don't end up with the big relief on an ex valve?

My experience with HDMD sucked!!! They ripped me for $100 (on about a $1200 purchase, the price went up $100 while my check was in the mail, they agreed to give me the previous week's price on the pistons), lied through their teeth repeatedly, called me a liar repeatedly, gave me bad feedback, and would NOT retract & give my $100 back until I retracted my complaints to Ebay. They even changed their ad to throw in "free" rings because they were so worried about my complaint to the FBI. They have either have someone on the inside at Ebay or someone doing some good html programming, because when they changed their ad to fight my claim, the sale a month or two earlier where I bought mine changed as well. I'll NEVER HDMD again. ALWAYS use PayPal!!!