Ryan,
I,m not sure what to tell you. You are dealing with two factors. The position of the engine is also determined with the type of mounts you are using with the plates. The different types can change how high or low the engine sits and how it sits in relation to the firewall. We wanted to position the motor as far back and low as possible. What do you have on there for headers now?
What you could do is order the Hooker long tubes, trial fit them and if they fit then get em sent off for coating. I know this is probably the very thing you are trying to avoid but maybe the only sure way to find out.
Kurt
www.autokraft.org