Thanks for all the info and advice guys.

I just wanted to try and keep in as original as possible
without doing a conversion.

It's been put on the back burner for now and am looking
into other options such as going OS for a year.

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO