Speedwork + marathon = ?

So in September I jumped into the Sojo marathon wanting to see what a years worth of much higher mileage yet no speed work would do for me in a road marathon. Would the strength translate into speed?  I found yes, but during the race I wasn't sure how it would turn out so when I was running the last 6 very fast I knew I could have done more. So I decided to recruit friend Mark to write me a 6 week real marathon training schedule. 3 runs a week, all structured, all faster than I was used to. Tempo runs, intervals, track work, Yasso's. Hard threshold work!

So this is the 'what can I do in a marathon if I train speed' race. Tri States Marathon starting at Utah Hill which is 26 miles NE of Mesquite. One turn the whole course, downhill the first half but then some decent rollers the next half. Oh, and around 20 degrees. 

I don't think this is as fast of a course as others, and I don't love the idea of downhill aided courses but truth be told, that's what most races around home are. I am happy with how training went. My goal pace I trained at was 3:12, so that's the goal. My current PR is 3:26 so I would definitely like to be under 3:20. Sojo felt comfortable for the most part. I'm guessing this won't be. I'm hoping for a time and performance I am so happy with I won't feel the need to better for a while. I can't wait to get back to the trails!  Here goes nothing!