What are the specs of your Crower cam?
I reckon you will have to ask a local cam place to recommend the valve springs to suit your cam. Crow cams can help out. There's also Euroexport, BRDracing, and Paradise racing that have 3TC springs.
http://www.euroexportinc.com/3tc/valve-train-components
http://www.brdracing.com/3tc_valvetrain.htm
https://paradiseracing.com/shop/engi...oyota-2tc-3tc/
I have a Wade cam 1147BS for my 3TC: 224 duration @ 0.05, 0.449" lift. My cylinder head machinist got me a set of harder springs from crow cams. I think they cross reference with Holden 202 valve springs.
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