I just upgraded to relays on my 73 MGB. I purchased what I needed here, WWW.allelectronics.com <http://www.allelectronics.com/> Prices are great and they have everything you will need. Here are part numbers; Relay 30amp 2 needed; RLY-351 Dual relay Socket; SRLY-4 Weatherproof blade fuse holder; FHP-25 Total cost was about $20.00 John DiFede 1973 MGB