Well after further research I've found that both of us are wrong.  The Viper V10 uses a pattern similar to the small block but the bolt holes do not line up, apparently it's one all it's own, why they did that I have no idea. I put a clutch in a '92 a long time ago and it didn't look like a SB pattern to me but I guess it's similar.
"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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