I bought the $50 Mancini tool and it works fine, you can't take all the springs off at once though, you'll have no way to keep the valves from dropping into the cylinder. I use a cheap compression gauge hose with the valve core removed to put compressed air in the cylinder. You can only do one cylinder at a time that way though.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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