Had a friend give me two engines, an Echo pb1000 (21 cc??)blower and a stihl fs-85 weed eater.. "he said neither one will run there junk"

15 min after I got home both run like a top, just spray clean the carb and adjust the needles and they start right up.

Now what to put them in>??????

I have read alot on here about the Echo's but what about the Stihl is it good to convert.