I had a near stock 904 in my Duster and in my Scamp. Duster weighed 3000 and the Scamp weighed 2700. Went from a 340 to a 360 and then to a 408. Et's from 10.40 to 9.60 off a trans brake. The only problem I ever had was cracking the converter hub. Switched to the A500/42RH style hub with the flat drive hub and never had another problem. Not sure why you guys think they won't hold up.

"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.