I find it curious you don't know your possible vehicle record speed. You said Comp Coupe. You said inline engine. OK is the inline vintage. So look up XO fuel, gas ,blown, unblown. If it's not vintage and you know the cubic inches, look up the records for the alphabetical class speeds. The records are all on the SCTA site. If you don't know the alphbetical engine size AA,A,B,C etc: ask. But better yet look in your rulebook.........................You do have a rulebook.................?
Great guys here will answer questions too help you interpret what it says, but we don't build your car................Good Luck