240s don't often need the valves adjusted - but when you change the cam, you definitely want to check the clearances and adjust as needed.

The most cost-efficient way is likely to see what adjustments are needed when you install the new cam, and buy the few shims you will need at a dealer. You might end up swapping a few shims around between valves and so reduce the number of shims you need to buy.

Be sure to reinstall the cam bearings (hold-down caps) back into their original locations. I'm told they are factory-matched to the locations so the cam will rotate "true".
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DAMHIK: Don't Ask Me How I Know - - - Sven: '89 245. 951 ECU, open-front airbox, E-fan, 205/65-15's, IPD sways, E-Codes, amber front corner reflectors. 500 mi/week commute. '89 245 #2 (wifemobile). '90 244 (spare, runs).