That was the big problem , some people wanted D ports some wanted O ports some wanted cv1 convertible ports and there just wasn't enough overall demand or even enough on one segment to keep producing them at $675 they were a bargain to buyers though.
People should have bought two set just to keep in storage at that pricing.
I wish I'd kept more for myself Even.
old set up-3250 LBS 69 firebird T-88 turbo 455 .030 CAT H beam rods, stock crank, stock block( 2 bolt) performer intake, 850 carb 6X-6 heads 114 cc ( unported) TH 400 and 3.73 gears = 9.76 @ 141 with a 163 short time = 725 RWHP and 878 HP @ the crank
new set up - same but with home ported heads and Gen 7 DFI, my custom SS headers