Daughter needs Gas mileage from 273 commando

Is the Cam that ratical ? I mean ,on a street car / Driver? If you all think the Cam is too big ,I am willing to hit the wife up for the x-tra $ but budget is all but gone. Have to be SURE before spending more money and you all know what I am saying.....

Both toolmanmike and I have an Isky E-4 solid cam in our 273's. You can listen to them under the sound bites sticky under exhaust. The E-4 is 260 duration and .425 lift, up to 625 cfm carb. Power from 2,000 to 5,500 RPM. I can get 20+ mpg cruising at 70 on the highway with the stock 500 cfm AFB. The next step up for an Isky solid is a B-777 with 280 duration and .480 lift, 650 to 750 cfm carb. Power from 3,000 to 7,000 RPM. If you know what you are doing, You will easily bury the speedometer in a 65 Barracuda with those gears and tires. When I first put my 64 273 together I was running a 284 duration TRW solid cam TP-141 and a 600 Holley. Luckily I had a 4 speed. I think your cam would be great in the 273, but I would not give it to my daughter, I have two, for a first car. I'll be in Greenwood somewhere in the middle of March. I run almost to Greenville before turning south on I-26.