Brettly-2008
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- SS Commodore - Ford Territory ... both camps
You're over-thinking too much.
It's not SV5000 or vn grp a that had d port heads & 4 bolt block...
From memory SV5000 didn't even have 4-bolt. It was only Group A that had factory 4-bolt in VN. Anyway, 200kw was a basic header/exhaust, intake, knock sensor and small cam upgrade (circa Crane 276?). Stock heads and stock pretty much everywhere else.
If OP is wanting to go 355, do yourself a favour and bump comp up to at least 10.1. I did a stock comp 360 (0.060 bores) build with a Crane 284 and bananas (bigger throttle body, tune, good exhaust etc) and it wasn't earth-shattering. Good torque though. I didn't persist with the EFI for long and swapped for a Harrop and Holley set-up.
Personally I'd keep it stock and maintain its collectability.