Magnum head swap compression increase

I've got a speedmaster intake. Carter carb. The car came with headers. The front end will be safe. I gotta do brakes. I gotta do wipers, lights, fuel pump, radiator, stuff like that. But I got a free 360 and a free 727. Me and my brother just want to take the parts, put them all together, get this Mopar back running, get a title, and bam! Another Mopar back on the road. It's a good straight car and right now is a good time to get to putting it together for me.