Here's the link to the speedway led taillight/turn signals with the 47-53 housing for $31.95
http://www.speedwaymotors.com/xq/aspx/paging.yes/dept_id.433/display_id.4051/qx/Product.htm


Here's the link to speedway for the LED bulbs if you've already got the housings:

http://www.speedwaymotors.com/xq/aspx/dept_id.433/display_id.3032/qx/Product.htm


And here's the link to the flasher for LED lights, which I believe you can find at any truckstop in america.
http://www.speedwaymotors.com/xq/aspx/paging.yes/dept_id.433/display_id.4372/qx/Product.htm

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi