Thanks for your help and suggestions guys much appreciated. I pulled the two end main bearings and I edge reamed one piston and pulled it for inspection. The bearing surfaces have worn away the tin overlay but the crankshaft is in excellent shape. I removed the top piston ring and the their is very little carbon so cleaning the piston will be easy. The piston looks to be fine no scoring of it or the cyllinder walls. I am going to do a measurement of the bore to see what the taper is. I had a second opinion and they felt the ridge was small and the wear on the lifters minimal. I pulled the cam shaft and It doesn't show any major wear. I will look into another cam. Perhaps Im better with the cam from my rv engine since it would be the right one for an rv/truck chassis. We took of the timing chain and cam sprocket and underneath its stamped High performance pass so Im guessing the engine was which we think is a 73 is originally from a car, another reason why the cam is not best for my rv. Im surprised that the engine is in such good shape considering the timing chain and crank sprocket were so loose and worn. This engine has a rebuilt tag from 1985 perhaps they never changed the timing chain then?? I know Im neededing new bearings and rings, timing chain and gears, oil pump and a different cam at this point. What is the tolerence on the bore its .030 over from the 85 overhaul?