hi . got these on a real decent lookin holley #4781 dbl pump 850 carb . no numbers or ID on 'em ? anyone have any company info , history with them , etc ? use 'em ? unload 'em ? they look pretty handy . but if tricky to use may not want to , sell 'em , and just replace with standard blocks . thanks for any info . del
kept searching internet - looks like maybe brad urban carb shop speed blocks . favorable comments , and uses standard holley jets . they mentioned the weber power plates and speed blocks but they sound like they use special jets , and they look real expensive . these look simple enough . but urban passed away and inserts may not be available anymore if needed . he was a big name in carb setup awhile ago . still curious if anyone has used these before though .
gonna order standard replacement AED metering blocks from summit and sell 850 DP carb with both . that'll give somebody some flexibility . still appreciate any info if out there . thanks . FYI : got the AED blocks today - look real nice/oem . comes without jets but has the bowl "slosh" vents and idle screws . about $50 each .