You brew approx. 3.5 gallon batches in a 5 gallon kettle and ferment in an 8 gallon bucket? Time to get some more size-appropriate equipment. Furthermore, racking to secondary with all that headspace WILL be an issue.
Anyway, to answer your question:
4.50 gallon boil
0.80 boiloff rate (per hour)
3.70 gallon batch
Approx. 1.066 OG
Approx. 1.014 FG
Approx. 65-75 IBUs
Approx. 6.5% abv
3-4 weeks in primary
2 weeks bottle conditioning w/priming sugar
56% Extra Light DME (added to start of boil)
31% Extra Light DME (added at 15 minutes left in boil)
7% Crystal 10 (steeped for 30-45 minutes then removed)
6% Corn Sugar (added at 15 minutes left in the boil)
0.50 oz. high alpha "bittering" pellet hops like Columbus, Magnum, Warrior, etc. at 60 min.
1.00 oz. mix of your choice of aromatic pellet hops at 10 min.
1.00 oz. mix of your choice of aromatic pellet hops at flameout
1.75 oz. mix of your choice of aromatic pellet hops at 7-10 day dryhop
Safale US-O5 dry yeast