4 inch stroker cam size question

I didn't forget the tire size, I just don't know what I'm going to use yet. Still looking at wheels and tires. I think the calculations on comp. ratio sound about right. I will have to look at the specs on my pistons and see what the valve reliefs volumes are. I looked at the Comp cam that I had and its a 305H, 525 lift but the duration is 305 so its a little much for AC and power brakes.