I own an 09 street bob and i was going to do a 107 kit but i was also looking for some head work. my question is i have seen some used 110 heads sell for 400 but will this work or can it work? thanks for any info guys

 

Lot of folks do that.

 

Having heads worked to your build will be a lot better than 110 heads that are stock.

 

I thought the 110" had a different shaped combustion chamber and used different pistons?

 

Both correct. Not worth the money and effort. Some good port work on the stock castings will work great.