What motor are you running? I can say that we really do not make a header specific for an art morrision chassis. If the chassis deminsion are racially different then stock I'm not sure maybe art morrision can suggest a header. If it is simlar to a stock chassis then the SB or the LS1 may fit. I know there are a couple chassis builders that with an LS1 only there headers will work. If you give us some more info we maybe able to help
Thanks
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