6'2, 340, 26% body fat.. regardless of the high body fat, you must be built like an ox. I'd advice you to hold off on the steroids for the time being. Get on that diet you were talking about in your previous thread, keeping working your ass off, hitting the gym, add in a little bit of cardio and you will be ready in no time. The benefits will be a lot better for you if you wait until you slim down a bit. Less sides, more gains. I'd shoot to get under 20%
As far as your cycle. I don't think there is any reason to use dbol if you are using test prop. Also lower your dosage of test to 150 mg EOD. How long do you plan to do this cycle? What do you have for support? And what is planned for PCT?