74 Challenger with twins

[RUNCHARGER]

Ha, ha: Yes, your mind has to go all-in working on this sort of thing and family time kind of suffers alright. No interruptions is a huge help when dealing with wiring for me anyway.

[YellowThumper]

Got into the wiring mindset updating the wife's 68 Mustang over the past few weeks. All while working on it I was reassessing the Challenger plan in my head. Stepped straight over from hers to mine and knocked it out.
Full attention is a must when deep into wiring that is full custom.
Had a decent plan when I first started this. Now though, planned layout is much cleaner.
Well it will be when I splice off all the excessive lengths.

[YellowThumper]

Squeezed in the addition of 02 bung this morning.
Added bonus is the sensor still screws in.
Will be just clamping the pipe back together. This will be another one of the "transition" points. Will allow for turbo install first. Then move rearward replacing the rest.

[YellowThumper]

All the engine side is sorted properly for connections.
Tonight I finished all the wiring connections in trunk for fuse/relay block. More first attempt wiring removed as well.
Next up is passenger floorboard to connect the remainder. Along with wiring in the O2 wideband. Not much photo worthy. All individual wiring remains loose. Purdy will come after all is known to function properly.
Coil testing soon now...

[YellowThumper]

Following thru with recent statement of "I have a plan" for custom instrument panel. Revised plan is to just have gauges flush mount as they are intended. Really wanted to flush mount them all below the face similar to how factory gauges are. However, at same time this needs to move forward. One of my biggest problems to overcome is the "because I can" mentality. Skillsets are there but time in life is not. So compromises will continue.
Boring out the large holes went simple enough. Some old school calipers came into play. OD measurement transferred to ID for the holes.
Small ones were not as simple because of the lack of clamping. Off with the vice and in with the 123 blocks and toe clamps.
4 holes down and 3 more to go.
Finishing this to allow removal of temporary guage setup that now resides on trans hump.
Plan is to make a center console that will house electronics.

[RUNCHARGER]

That will be an improvement you'll notice all the time.

[YellowThumper]

Finished boring out the remaining holes. Unfortunately not without a little drama. Was using a thin tipped cutter to slice a thin slot to drop out the centers. 5 holes in and the cutter failed and grabbed. Because every inch of this thing is curved the mounting was not as solid as it should. It moved and left a nice gash in the face. This was last friday night. Said a few curse words and walked away. Today though I put on big boy pants and welded it up. Happy to say it came out perfect. Probably some of the best aluminum welding I have done. Cleaned and preheated everything.  Also took time with same thickness piece to dial in necessary power.  .
Mounted all the guages. Me likes...
Also committed to finishing this change. Removed the old and placed in the new.  .
Thru the years I have collected extra switched for lights and wipers. I will use these mounted to the yet to be made section on the left. It will house the 3 switches and also the AFR guage. I chose to separate it from the rest because even though it is same series of guages. How it lights up is different because it is digital.
Removed the stereo and a series of switches will reside there.
May just go with a bluetooth setup to run with my phone. Rarely listen to on air stations anymore. There will be a center console to house ECU, power chargers and hold phone. And of course my coffee...

Feels nice to finally get farther than just talking about it.

[nsmall]

Looking good.  Hopefully we can connect at the Fall Fling.   

[YellowThumper]

I would like that. I am soooo ready...

[Chryco Psycho]

LOOS GREAT , BEAUTIFUL WORk ON THE WELDING TO REPAIR IT

[YellowThumper]

LOOKS GREAT , BEAUTIFUL WORk ON THE WELDING TO REPAIR IT

Thank you. Was a bit stressed. Have welded a bunch of aluminum along the way for this. But this part is all visual. The others (intercoolers and piping) I can blast away because it has been just functional.

Stepped in further with wiring. With new plan this initial box will now be relegated to powering the ele fans and relays for headlights. Headlight relays will be much further down the road.

[YellowThumper]

AAAAAAH!
I must stop going deeper in...
Again I had a plan in the beginning (years ago). Plan now is much improved with trunk mount fuse block and front mount block. Stripped out numerous wires that were running front to back for power and switching.
Short story is more fusing and relays in 2 places will allow for significantly less wiring lengths.
Initially the main battery positive went to a bulkhead all the way up front, fed front fuse block and then fed back to starter and relay. Main positive was snaked under car.
Removing speedometer cable because of going GPS provided a firewall hole. I will use that for a bulkhead pass thru connection. That then allows the positive battery cable to run inside cabin.
My reasoning for this now is more complete removal of wiring on fenderwell for turbo clearance. Miles of room now.
Probably will only utilize about 10 percent of wiring that is in bucket.
Committing full in now for successful EFI fire up. 

[YellowThumper]

Made a simple bracket that mounts to existing booster mounting bolts to hold solenoid and hub.
Not as clean as envisioned but still vastly improved. Will make a black textured ABS cover shield to hide the busyness. Further cleanup the factory harness gets dropped down along the frame rail. It has already been residing there.
Electric fans and their controller next.

[YellowThumper]

The wiring in bay that powers headlights and blinkie things has been relocated down to side of frame rail. Front relay has been pared down to the current necessities. Electric fans for now. Headlights later. Made a cover to shield and hide fan controller. Orange covering is glued on dense rubber to prevent shorting of exposed contacts. New positive cords run up front and starter. Main from trunk battery next up.
Factory guage wiring is all safely deadheaded. Left and right bulb wiring was spliced to a new plug to mate to new directional indicators. Speedometer cable removed from trans. Installed another cable mounting insert that I tapped and plugged.
Decided to cut the drivers side exhaust pipe also. Going to mock up both turbos again to see placement comparisons. Partially because I want to see them on again. But mostly to guage running the exhaust out and also try and see if I can design the cold air boxes. They are another "I have a plan" item.
Not much really picture worthy. But that is exactly the point. Clean and empty. Unfortunately with the clutter gone the crappy destroyed paint is glaring. 40 years ago before my ownership a battery exploded.

Positive cable connection and fabrication of the left side instrument switch plate next.

[YellowThumper]

Wrapped up and deadheaded the factory dash wiring.
Only splice was for the blinker arrows.
New guages are all wired up and it is now finish installed. Because guages are not mounted the way i really wanted them. I have decided to wrap it in the woodgrain. See pic with small splotch. Will pull guages at a later date for this.
Temporary mount for the switches on the left side whil I work out the face plate for it.
No pics but positive cables are all finish mounted.
Reran all the engine harness wiring. Just with tape and zip ties. All will be finally wrapped when known that it works.
Have to still figure out how I will setup the air idle valve. So a few more wires will be added for that. Unfortunately turbos are off again. The mockup reconfirmed placements are as intended. Also made plans for the cold air intakes. Now to finish connect necessary wiring inside cabin.
Also sprung for a cheapie stereo with bluetooth.