'80-'85 blocks--2 pc RMS
'86 & newer blocks - 1 pc RMS
Pre-'80 block - 2pc RMS
'80-'85 blocks - 2 pc RMS
'86 & newer blocks - 1 pc RMS
2 piece RMS, w/ Oil level sight plug ,No dipstick
Pre '80 blocks - 2-pc RMS
Left hand
Right hand