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ApacheNick · 02-25-2018, 08:17 PM

The most important number would be the block casting number. IIRC it should be on the bolt flange at the back of the block that the bell housing bolts to. Should be on the left side. The numbers stamped in front of the right head would be good as well. Those will tell you the HP rating, which carb set up (1x4 or 3x2) it came with and, iirc what transmission. The other site I posted has info for all the WBC casting numbers and suffix codes.

Have fun!

02-25-2018, 08:17 PM	#16
ApacheNick Registered User Join Date: Apr 2016 Location: Dawson Creek, B.C. Posts: 143	Re: 58 Bel Air 348ci The most important number would be the block casting number. IIRC it should be on the bolt flange at the back of the block that the bell housing bolts to. Should be on the left side. The numbers stamped in front of the right head would be good as well. Those will tell you the HP rating, which carb set up (1x4 or 3x2) it came with and, iirc what transmission. The other site I posted has info for all the WBC casting numbers and suffix codes. Have fun! __________________ Nick 1961 Apache short stepside 4X4 SBW 348/4 speed 1960 Apache C-20 long fleet custom cab BBW 283/4 Speed 1967 rust bucket Olds Cutlass with a 455 1972 GMC K-15 350/4 speed long fleet