Can I put two L5410 Xeons in my Mac Pro 1,1?

Question as above.

My 2006 MP is obviously out of warranty and I have already changed the logic board myself so please don't advise me to take it to a Apple store :)

The L5410s are LGA771 like my current Xeon 5160s (dual cores)

The 5410s are both quad cores which is why I want to change them over :)

Thanks!