olds 307 and 403

I splurged and bought one for my 70S, looking for a trouble free install. Thanks

oldcutlass

It really depends on how much trouble you want to go through. Keeping it under the hood is the easiest. Most mount it to the firewall or on the wheel well.

Olds64

Ditch the charcoal canister and put it behind your passenger's headlight.

olds 307 and 403

No charcoal canister there, just need to be careful opening the rad cap and don't have it too close to my added overflow if I go there. Thanks

Olds64

Right. I suppose this is for your 70 in your signature? Let us know where you install it.

olds 307 and 403

It is the 70S and I will show pics.

VC455

I put mine under the screen for the air intake at the base of the windshield. I made a light gauge cover and painted it black. It is virtually invisible--which was my object.

jfb

under the dash board and it will be dry and not subjected to the elements of any kind. just do the wiring correctly.

olds 307 and 403

Under the dash sounds good. This is a Mallory 6AL since hooking it to my Mallory Magnetic Breakerless is super easy and I can make it look close to stock.

CDNW30

On my 70 442 I mounted it on the inner wheel well, drivers side behind the battery. I can access it easily to change rpm chips if needed, but is generally hidden from sight.

olds 307 and 403

Another spot to consider, I am liking inside and the Mallory doesn't need chip changes, thinking a bit over 5000 rpm for the rev limiter.

Ozzie

Mine "failed" while in an under hood location. There was no moisture problem, but likely could have been a heat problem, as most semi-conductors are heat sensitive. I'd recommend wherever it stays the coolest, especially if it operates in a hot climate. If the car has A/C I'd tend to recommend the passenger compartment. Under the hood gets more air flow, but in the passenger compartment gets lower temperatures in a hot climate. Which results in a lower operating temperature of the unit, I don't know. Perhaps call the technical people at the manufacturer.

olds 307 and 403

No A/C but our Summer's haven't been very hot but that will change at some point. I think inside is the safest bet under the dash, I leave the fresh air vents open all Summer.

coppercutlass

Im going to an msd here real soon. Im mounting it right on the underside of the dash facing the trans tunnel or trans tunnel with small mounting brackets . Looks are secondary to function as well as accessibility . Wont look horrible but then again i dont really have an interior. I dont think trim panels , carpet , and racing buckets count as one lol.

oldcutlass

Why not remove your glove box and make a bracket to mount it in there behind the door? Out of site and easy to access.

coppercutlass

The shorter the wires the better.

olds 307 and 403

I like it, we may have a winner.

olds 307 and 403

I have it mounted to the glove box door and I currently running the wiring, should work awesome.

oldcutlass

Make sure any grounds are to the car body and not the door.

olds 307 and 403

Thanks, this was a great suggestion. I need to lengthen, solder and heat shrink all the connections anyways, so yes to under the dash on the driver's side ground and the motor itself as well. I am also adding an inline fuse on the main power wire as well.

KDW

Just my 2 cent i mounted mind inside car top of side of A/C Box, out of sight, great location its velcro to the top easy access if you every have to change.

67 Cutlass Freak

MSD does not recommend installing the ignition box inside any enclosure such as the glove box because of heat build up. I mounted mine on the lower dash below the glove box. Easy access to change rev limiter settings, or for adding any other electronics. You should also be sure to use the rubber vibration dampening mounts. Follow the instructions and run the large hot and ground wires directly to the battery. Do not ground to frame, or body.

Run to Rund

On my 66, I made a shallow glove box out of sheet metal, with a plexiglass back (so I could show the MSD 7AL3 box if desired). I mounted the MSD on an aluminum plate and then to the steel cross brace at the bottom of the dash. I can remove two nuts and drop the MSD down to the floor if I need to do something to it. Since the dash did not have a radio, I added the radio brace to help support the weight. I am using the rubber dampers between the MSD and the aluminum plate, and the box is not inside the glove box, but in the open space behind it. Plenty of room and there is no heater in the way.

olds 307 and 403

I considered there as well. Mine is now mounted to the door and wired in. I have fixed the latch with Epoxy and a 1/2" bolt. The bolt threads push and latch the mechanism. Remove it and it opens right up. Time will tell if it is a good spot.

ELY442

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