Inliners International Forums General Discussion Engines GM 4 cylinders 151 153 181

Here's some more info.,
The 153,230 and 307 all share the same bore and stroke.
The 153,230,250 and 283,307 all share the 3.875” bore and the 181, and 327 ,350 share a 4” bore.
The 153,181,194,230 and 250 and Vega 4 share the same rods, 1.030” wide at the big end.
You can use the stock or aftermarket straight or splayed cap's on your 4 or 6 engine if the are for the small block Chevy & for the small journal crank. >>
if you run a roller cam you use chevy SBC lifters and Olds 350-455 tie bars..>>
The 153,181,194,230,250 all share the same timing gear and the crank gear is shared with the 292
Push rod guide plates you use the 350-455 Olds or the 151 chevy for the 1977-79 engine.