stock x-dimension 31 ss
 

I was wondering if anyone knew what the stock X-dimension is on a 91 31ss. Im asking this because I have no room between my hatch and spark arrestor. I don't have a high rise intake and my spark arrested on my carbs is very thin and its almost hitting. I know someone with a 02 sonic 31ss and they have a high rise intake on there engines and still have a good amount of room above it. The only thing I can think of is if someone changed the x dimension by raising up the engines and drives. or is this just how the boats were made at that year.