LS/VTEC is damn good pretty much B18b block with B16a head. I'd prefer a B20 block.
If that shop is saying $5,000 for a running swap is pretty good, though $5,000 spent on boosting your A20 will rake in a shit load more power then a stock B-series. For a boosted A20 you could have basic set up with an SAFC/boost retard for tuning for about $3,000. Then figure a well built stock engine will cost $1000 to $3000 for a fully built engine.
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