I agree with Gilly, your cycle should look similar to this:
Week 1-10 Sust @ 500mg/week
Week 1-10 EQ @ 400-500mg/week
Then get on Clomid three weeks after last sust shot!
Your a big guy, so you may need more gear than the usual dude. My roommate was your size (290lbs, 6'5", 14%bf) and he started his first cycle two months ago and now he is up 30 pounds (and he is using L-dex!!). Here is what his cycle looks like:
Week 1-4 Dbols @ 35mg/day
Week 1-10 Enanthate @ 600mg/week
Week 1-10 Fina @ 100mg EOD
Week 11-13 Propionate @ 500mg/week
Then clomid three days after last prop shot!!
Good luck with your cycle and please research like crazy before you start sticking yourself!!