Most Ford small blocks I've seen use 45 degree boots, but you can use 90 if you want. The link below is for 45 degree. If you search some more on Summit's site, you'll find 90s. I did a quick check about Summit's shipping policy, and they consider Canada NOT a foreign country. Go figure. 
Ford Racing M-12259-C301 - Ford Racing Spark Plug Wire Sets - Overview - SummitRacing.com
Custom length wires get a bad rap because the person making the connections does a bad job. Find someone who has made a bunch of sets, and you'll get a good job done. I made mine and have had no problems.
Using the engine driven fan is about as simple a system as you can get. It works and has only one failure point: the belt. These work well. If you replace the radiator, and have a properly fit shroud, you'll cool just fine.
Ford Racing M-12259-C301 - Ford Racing Spark Plug Wire Sets - Overview - SummitRacing.com
Custom length wires get a bad rap because the person making the connections does a bad job. Find someone who has made a bunch of sets, and you'll get a good job done. I made mine and have had no problems.
Using the engine driven fan is about as simple a system as you can get. It works and has only one failure point: the belt. These work well. If you replace the radiator, and have a properly fit shroud, you'll cool just fine.