Looking at that rocker arm comparison and the cylinder head cross section views I would be tempted to buy a couple different stud mount rocker arms and studs, singles of course an get an adjustable puhrod and play around with the pushrod length to see if something would work.
"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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