You running tren enth or tren ace? If it's tren enth, you can take it twice a week with the test. If it's tren ace, ED pokes.
I would say 75mg/ed of dbol is a little much, even for someone your size, 50mg/ed would be better.
You didn't mention PCT, which is bad. However I'd run the test a bit higher, maybe 750mg/wk, and 500mg/wk tren. Combine that with the dbol you should BLOW UP if you eat right.
You need to post a pic bro, I wonder what 300lbs looks like on someone your height. I'm also curious as to how it would compare to me!