10.5 to 1 pistons

I have a 65 Barracuda 273. when I bought this car it had a Edelbrock 1405 carb on it. I thought it had the 10.5 to 1 pistons and a solid lifters. Boy was I wrong. It has the 8.8 to 1 pistons with hydrolic lifters.
I want to install the 10.5 to 1 pistons, but are not sure if they'll fit with the stock heads.
Does anyone know if they are a direct swap in or if the 10.5's wont fit with the stock heads.
I also am going to put the Isky E-4 cam in it with solid lifters. I hope that this isn't going to be a problem ??
Any information would be appreciated.

Still Looking !!