While this does not sound important, one major problem I have been having with this Scrambler has been the spark plug wires. My TBI engine has Ram Horn exhaust manifolds. With this set up, you can not run the spark plug wires over the valve covers. You have to run them behind the engine, down, then up to the spark plugs.
The "heat shield blankets" I put over the crappy Accel spark plug wires have worked, i.e. I haven't melted anymore boots. But, this was not the ideal situation.
GM cars that use Ram horn manifolds run the wires behind the engine, down, then up to the spark plugs. They also usually have special brackets and metal heat shields. I have tried my best to replicate this set up, using off the shelf parts and careful wire routing/securing.
To start with, I needed a set of wires. I bought a set of plug wires from NAPA that fit a 1974 Corvette. I did this for two reasons:
1) Corvettes of this era used HEI distributors, which is what I have on my TBI engine
2) They used Ram horn manifolds, so they have extra long wires for plugs 1,3, 2, and 4.
Picture of the wires, and a new coil. To give you an idea of the length of these wires, the sheet of plywood is 5' long:
I also purchased these wire clips. They are a stock item at Advance Auto Parts. I knew that I needed something to clip the wires to the engine, so I gave these a shot. Worked out good, for now. I had to cut the grommets to slide over the wires. You then push the wire/grommet into the little notches. I did not cut any wires, but it could lead to chaffing, if the grommets fall apart. I will have to keep an eye on this.
Not the most interesting, but here are some pictures of how I ran my wires. It might be helpful to someone else. Also, feel free to critique.
Starting on the passenger side front, #2 and #4:
Then back, showing #6 and #8:
Showing the clearance on #8, I have about 1-1.5" clear. Also shows the wires going up the fire wall. Excuse the mud :-)
And from the valve cover mounted bracket to the distributor:
The passenger side wasn't too bad. Wire #2 could have been shorter, so I ran it wide and covered it in black tubing to protect it from chaffing.
The driver side was a bigger pain, due to the steering shaft, plus more stuff over there (wiper and coolant bottles/master cylinder brake booster) and the fact that the engine is offset to this side to allow front drive shaft clearance, due to the 700R4.
From the distributor to the valve cover bracket:
From the bracket to *7 and #5:
I used a plastic clip, in an existing hole in the front fender, to secure #3 and #1. This gets them past, and clear of, the steering shaft. Yep, leaking master cylinder lids take the paint right off of sheet metal :-(