HI...OK for Christmas I get to choose a cool present. My choice is a Langdon HEI distributor for my 1954 /55 235 engine...how hard is it to install...what are the pros and cons...do we like the people that sell them and what is the overall reliability of the unit. If you got to choose a Christmas present would it be this unit or another? Of course I will not make a choice until I hear from you guys with more experience than you can shake a stick at....THANKS as always, Steve