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

I drove into Carson City today to get the rear sump pan, oil pump, and pickup for the 153 from the guy I bought it from (chevy2inreno). I also stopped by Auto Machine Marine to see what my choices are for head and crank work. The main thing I learned is that the difference in the rod journal size of .100" between the 153 & 181 will most likely yield only about +.080 in stroke. It depends on the condition of the 181 crank and availability of undersize 153 rod bearings. I need to take in the crank, talk to Ernie, and contact the actual grinder in SOCAL to see for sure. I'll take the head in to get 1.95 intakes, 1.60 exhausts valves, screw in rocker studs and guides. I'll do the HAMMER removal of intake bosses and installation of my PES lumps. (Sorry Tom, I've had the lumps and hammer for a long time. ) I got 1.70 BBC roller rockers and will deal with Erson for a cam, lifters, and springs. Beater