1970 Chevelle LS1 Conversion
1. Air intake system. Seems like the sources I've found online show people making their own, using 1999-2005 silverado cold air intakes, or even the stock intake tube from an early LS GTO (2004?). Perhaps someone can confirm some of this info or make a suggestions.
2. Computer programming. Is it a wise investment to buy software (HP Tuners) or should I just take it somewhere and pay $200? I don't intend on making many significant changes to the car once it is running well, so it's not like I'll be dialing it in on a regular basis for max performance. I guess the question is "Will I have to make programing adjustments multiple times before it run right?"
3. Has anyone ever tried to use the VATS system intead of disabling it? I was thinking of moving the ignition to the dash and using the donor car's ignition switch and key. Flaming River makes a tilt/telescoping steering column without an ignition switch.
It feels like I'm getting closer to getting my chevelle moving. Thanks for your help everyone!
Aside from cosmetic improvements, I have made some good progress on the engine. I have all of the engine components and computer mounted and positioned. I even have all of the wiring done on. The car and mostly integrated with the chevelle's harness. The starter, injectors, coils, fans... Hell even the horn and lights are hooked up but I can't for the life of me located a single available wire to activate the ignition relay from the chevelle's harness.
I tried a couple of black and purple wires that seem to go to the coil and idle stop solenoid but they have 12v in RUN but cut off in start. Then i found a brown wire that used to go to the regulator. It seemed to have power in RUN and START, but the car was struggling to crank. Turns out that its voltage was around 12v in RUN before the starter was engaged, but the voltage drops to 5v when the starter is engaged and stays low even if the engine manages to start. Needless to say, it can't run like this.
Can anyone give me some advice on how to approach this issue? Which wires from your chevelle harnesses did you guys use? Perhaps I have a problem with an ignition switch or something along those lines? I suppose anything is possible with this car :/
Thanks guys!

Dunno, maybe a battery kill switch.
The Best V8 Stories One Small Block at Time
I also picked up a pair of paintable bullet style mirrors (bulletmirror.com). There are two issues with the mirrors. The first is that the gaskets are WAY too large for the mirrors, so I'm going to have to either trim them down if possible or make my own. The second is that the passenger mirror is not flush with gasket in the front, so I'll have to try to shave the base of the mirror flat on a belt sander. The company offers returns within 14 days if there is a fitment issue, but I was out of town during my window of opportunity so I'll just deal with it. The mirror kit seems to be good quality aside from the things I mentioned.
Of all of my recent progress, I am most excited about the 2002 Monte Carlo seats that I've found. The leather ones were too expensive (~$800) but I managed to get a cloth set for $150. Once they are installed then I'll have them recovered or ditch them for a leather set if I can locate them at t decent price. I was very impressed with the pictures of other chevelles with these seats. Some pointers would be helpful from anyone who has done this or a similar conversion. My plan is to weld in seat brackets in the factory locations and then adapt my seats to the car so my measurements and process should work or serve as a reference for anyone who has factory brackets but doesn't have over $1000 for factory seats or wants a more modern/power/heated seat while retaining at least a little bit of the look of the factory seats.
First off, the Hooker headers seem to hug the floor pan much more compared to Edelbrock headers. For example, my collector tubes are parallel if not higher than the bottom of my transmission pan. Good news is I wont be scraping them on anything. Bad news is that the collector tubes are pretty much centered right on the transmission crossmember. There is only 1/8" clearance on the passenger side from the floorpan and at most 1.5" on the driver side. I've ordered a G Force Transmission Crossmember from Summit. We'll see if it helps the crossmember clearance issue.
Also, the brake distribution block is on the interior vertical face of the frame. It didn't look like it was going to be a problem at first, but it became clear as the driver side header was bolted into place that the header was going to swing out as it was tightened and hit the distribution block. My advise to anyone doing one of these swaps would be to get a Wilwood proportioning valve/distribution block and mount it by the brake booster/master cylinder and run custom bent lines. Kst8engineer has one and it looks like it completely eliminates the issue and is probably a worthwhile upgrade for anyone who plans to add a upgraded disk brake system in the future. I've moved my block to the top face of the frame for now, but it may hit the wheel well when I put them back on. Fingers crossed.
The MSD multiangle boots fit onto most of the plugs, but had to be bent on the front 2 plugs on each side in order to connect to the plugs and clear the headers. I'll post some pictures of them later. Overall, they seem to have done the job.
I have a few questions for everyone:
1. How much space do I need between the headers and floor pan so that I don't scorch my interior and so that my headers don't hit the floor when the engine twists to the side under load?
2. I'm looking for a good option for a radiator overflow bottle. Which one are you guys using?



