If I was building a 518/46RH for that application I would be using all the diesel stuff in it, drums, clutches, planets and overdrive section. Some of the diesel stuff(drums) won't fit in the case. The 500/518/46rh is still a small block trans. An ultrabell on a 47/48RH would handle it. Not sure if they changed bolt pattern on them though. No such thing as a 48RH, RE only and the 47RH was two years only, '94 & '95 diesel or V10.
"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 coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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