on a engine block (318 is the only real engine I have available) is 22" long. in 1/25th that would be about (.88), .0366(about 1/32nd) longer than in 1/24th.(.916 Not sure how accurate the kit builders get to actual scale but for me that would be a un-noticeable difference. Some builders do like to get it dead nuts on tho. Your results may very Just passing along the info