Big problem with the covers is both PCV holes knocked out + the oil ..does your car run PCV both VC's? Covers came out late 1970's..I see nice ones at the swaps for $30-50 pair..most people prefer the M/T
Here is an uncut set for $75 BIN.
http://www.ebay.com/itm/SBC-M-T-Valve-co...010&vxp=mtr