Ronnie
Good deal on the exhaust. Will give you spare money to spend on all the other bits i've reminded you about
If you can drop me your email address I've got some good bedtime reading for you on the subject of exhausts I can forward over.
As I feel - I've been looking at the numbers for my 1800 Pinto. Assuming that the exhaust valve opens around 55 degress before bottom dead centre (that's a guess, anyone got an exact figure?) and that I want to tune for around 4500RPM, then using a 4-1 configuration I need runners around 41" (1041mm) long - less the 55mm inside the cylinder head so runners about 1m long to the collector. If you then calculate the pipe diameter for each runner, that comes to 1.34", I was planning to use 1.5" pipe to match the ports so that bit is good. Doing the same for the pipe to the silencer gives a diameter of 2.68" and my silencer takes a 2.5" pipe so should be close enough again
