this is going to be my first mod.

im keeping my emmisions my current 7 seems to run alot better then my last 7 which was stripped of everything and only got 18mpg where as my current gets 27mpg

4mm tubing
 

Hey Guys, reading the thread here and there is a lot of good info. Recently I purchased the blues 4 mm vacuum hose to redo a '84 13b vacuum lines. When the part came in I thought I had order the wrong size (to big). So I ran out and tried it...IT FIT PERFECT! Slid on easy and didn't pull off with any ease. Actually had to pull pretty good to get it to come off. After I put the zip ties( tie wrap) on it's going to be bullet proof. Can wait!! Im ordering the 6 mm next.

Added the pic of the hidden vacuum leak. Also broke an oiler line in the process of taking off the upper manifold. Luckily I have another set.

4mm 0.16 Inch Blue Vacuum Silicone Hose Racing line Pipe Tube 59ft 18M
Roll $17.90

Rats Nest vs RB exhaust system (header,presilencer, muffler)
 

OK...I have read that I have to pull the air pump as part of the RB header install. Does this mean I am more or less forced to remove the rats nest?

No.