Definitly go 8 inch and if u want u can easily clear 38.5's..... and an awsome product is pro comp.. they all have there goods and bads but from my experience it rides 2x better than my friends duramax with fabtech.... superlift rides horrible on my stepdads 04 f-250..... rize is amazing but expensive.. more show than everyday play........ heres a pic of my 8 inch with 38.5's
