hi again i dont think you have the right fram for the engin seems weirod theres somthing wrong somwere there is only to typs of headsteadys one for the 350 witch i have .and one for the 250 both look same but there not the to holes witch fasten to the head are diffrent closer together on the 250. and wider on the 350 the lenth is the same i think not 100% sure but if your saying the frame. and engin numbers match it must be the right frame. hope this is of help