340 Build.

In the mid>late 80's......1971 Cuda, (3500lbs+), stock 340 block/2.02 heads, no porting...10:1, Holley Strip Dom, 850DP, DC.590"sft, although less cam is perhaps more, 1.75" Hedman hdrs, 727, T/A 4200 verter, 4.30's 10x28's, on stock leaf springs with clamps, shock extensions, snubber = [email protected]
I'm still relatively new to the mopar/muscle car engine building world (I can only rebuild a jeep 4.0) lol even though 95% made total sense to me, what does the DC stand for?