Great car. Yesterday I took my 78SC on a 120 mile drive to Baltimore with a Porschephile passenger who fell in love with the car. I brought this car out of a 7 year nap and here are some suggestions.
First, don't assume you are going to have problems with the CIS. If it is working now it will work when you put it back together.
Now:
1: Take pictures from all angles as you remove the engine. Pay attention to where stuff attach's in the back. Take compression readings and do a leak down test if necessary, do pressure tests on the CIS.
2: then take pictures of it on the engine stand. Again from all angles.
3: Things I did were:
a) Replaced the CC with a by pass (you probably don't have one)
b) Upgrade the chain tensioner
c) remove the air pump (you don't have one)
d) replace the injector's and sleeves
e) put on a pop off valve
f) new spark plug wires
g) remove and have your alternator checked
h) replace the accumulator and fuel filter
i) have the mixture set by a professional with deep CIS knowledge.
j) adjust the valves
I probably forgot some stuff, but that is it. For over 20K miles since I did that the car has not missed a beat and drives great.
