Complex sentence: SST Records released "Double Nickels on the Dime" on double vinyl in July 1984; "Zen Arcade" was released at the same time, which had been delayed so that both albums could be released simultaneously.
Split into simpler sentences: SST Records released "Double Nickels on the Dime" on double vinyl in July 1984. SST delayed the release of "Zen Arcade" so that both albums could be released simultaneously.