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Not knowledgeable about B20 Cams, yet resources exist to track down a specific cam grind / profile. Such as here: (copy and paste URL to new window / tab):
http://www.1800philes.com/ianr/_superlist_grinds.html
Else, you may want to ask at the Turbobricks site:
http://forums.turbobricks.com/
In the Turbobricks site article OEM AND AFTERMARKET CAM SPECIFICATIONS
Data compiled by Fredrik Persson
See the entry B18/B20 8v cams, rocker ratio 1.45 (TG Motor 1.5), third set of cam spec data:
https://turbobricks.com/resources.php?content=camspec
Observe discussion about valve springs and rocker arm length with high lift cams in B18/B20.
You will want to get a password account at the Turbobricks site so you can access the innumerable build threads with value-saving guidance on getting the best HP for your dollar!
Volvo Turbo World may have some useful info, yet appears mostly for OHC redblocks:
http://people.physics.anu.edu.au/~amh110/turbo_world.htm
Also, check the classified and auction ads:
eBay
Amazon
iPd classifieds
Turbobricks classifieds
Brickboard class ads
Other articles from other forums after a quick web search:
https://www.swedespeed.com/threads/b20-engine-build-cam-spec-thoughts.198727/
https://ozvolvo.org/discussion/4308/b18-b20-camshaft-experiences-and-options
One of many vendors. They grind from blanks?
http://schneidercams.com/volvob18b204cyl.aspx
KG Trimming is in Sweden:
https://www.kgtrimning.org/tuning-special/b18b20b30/camshafts/
Old Brickboard thread on this topic:
https://www.brickboard.com/RWD/index.htm?id=1346728&show_all=1
B20 block and head choice for performance build 120-130
https://www.brickboard.com/RWD/index.htm?id=1261897&show_all=1
Maybe information here at this Australian Site:
https://ozvolvo.org/
Hope that helps you.
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Beh.
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