5/7 lowering kit tire help

[fishhore]

Just picked up 59,000 mile original swb and ordered a 5/7 syndicate series drop kit from switch and was wondering if anyone is running this and what tire size you’re running or if you guys can help me decide on a front tire size. Switch recommends a 27” tall tire. Iv been searching on here all week and see some people are getting away with a 245/40r20. Front wheels I bought are 20x8 with 4.5BS. Can’t decide between a 245/40 at 27.7 tail or a 255/35 at 27 tall. Want to keep the inner fender on