I do not nor have ever had a Jeep with a SBC 350 in it, but if both motor and tranny are built right, shouldn't have any problems. T350 trannies last 150-200K miles easily if regularly maintenanced, 350/5.7L motors will last who knows how long with mntnce.
What year is the motor....older carbed one or did they do a newer TBI/EFI setup?
I would love to have one like that, nice small block, would rather have OD in it though, but V8 power would be sweet....I even miss the 304 I had in my ole CJ5
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'99 Tahoe, 3" BL, 285/75/16's , MT II's.
'05 Liberty Sport, -wifey's
'98 Poncho Fireturd, 3.8L, .....the purple pig!