MPG build 360

I run a 360LA in my Challenger, 2.76 open rear gear with a 727 darn near stock converter. I wanted decent power and good highway mileage as everything here is a 45+ minute drive to get to outside of downtown.

I would go with a good dual plane intake. I chose the Performer RPM air gap paired with a 625 Holley Street Demon carb. Smaller primaries so excellent throttle response but opens up nicely when you get on the fun pedal.

Headers.. even an inexpensive set of shorty's is better than the stock logs.. and dual exhaust.

I put a decent set of Promaxx aluminum heads on mine planning to stroke it later down the road. But the advise above is solid.. a decent set of stockish heads mildly worked can get you where you want to be.

I use an aftermarket HEI (GM knock off) ignition with Petronix III multi spark module and coil.. excellent results and not a huge $$ investment. Will clean up your ignition a LOT.. I highly recommend.

Cam, converter and RE gear need to work together. I relied on my local transmission shop for recommendations when I had mine rebuilt. My cam is pretty mild even with the extra .030 valve lift with 1.6 ratio roller rockers. Don't need to go too crazy to get good torque and a liveable amount of HP.

I'm probably gettin 16 to 18'ish MPG and I tend to be a tad heavier on the fun pedal. More conservative driving could probably get me closer to 20. Let us know what you decide and what the result is! All useful data.

Oh.. and I do not use a carb spacer. Tried up to 1" and the throttle response was worse. Maybe better at WOT but that was not what I was looking for.