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Thanks for the advice I’ve just been looking around and a lot of the OEM parts are discontinued so I don’t know if going after market with the 4.0 would be better cause I love the motor

I have a 97 ls400 with original motor (215k ish miles) and was thinking about rebuilding, is it a better budget/smarter investment to get aftermarket cams, headers etc. for the 4.0 or swap it for the 4.7? I’ve heard that getting parts for the 4.7 is a lot easier but I love the 4.0 million mile...