Where is the tachometer filter for a 91 firebird?

www.delteq.com/Rev5c_RS.pdf i am going to see if this helpss me... i have a 1992 firebird formula vin e with throttle body... just put the msd 6a in last night and my tachometer is at zero... tachometer is the rpm gauge... we are looking for the tach filter to bypass... it is suposed to be near the stock ignition coil.. i didnt upgrade that, so i am hoping to be able to find this easily... if i do... i will be back shortly with a better description for ya... some say this device could be a barrel though... it doesn't have to be rectangular...