best options for lowering my 63 c10

[Robbsc10]

hi, hope some of you guys can help me....... i have this 63 c10 here in the U.K i want to lower my truck as i dont really like the height it sits right now. it currently sits on 20inch wheels. it has 2inch drop spindles on the front and as far i as i ca see the rear springs have been heated up and tempered to lower it. i am after peoples opions on the best way to get it lower and also should i get smaller wheels say like 18inch, but finding it hard to find nice wheels with a six bolt patern

any sugestions and ideas will be welcome

thanks Robb