10.5:1 273 pistons with 360 heads compression ??

Yeah the thing is I got the heads and the motor and I'm a tight ***. I'm not gonna spend alot of cash on a 273 when I got a 360 under the bench in the shop. But hey it's in the car it runs strong now and I think it's got more on the table if I can make the 360 heads work. My cam I'm looking at is a higher rpm cam and needs some compression.