THE BLOCK ON A 55 CAR OR TRUCK WITH A 12 VOLT SYSTEM IS DIFFERENT THAN THE OLDER ONES .THE WATER PUMP SHAFT IS LONGER AND THE OLDER ONES DO NOT FIT. ALSO THE FLYWHEEL HAS A DIFFERENT TOOTH COUNT ON 12 VOLT .PUT ONE IN AN OLDER CAR YEARS AGO HAD TO FIND WATER PUMP PULLY SO THAT I COULD PUSH HUB BACK TO CLEAR RADIATOR.ANY THING 54 AND OLDER WILL PURTY MUCH FALL IN .BOLT HOLES FOR MOUNT UNDER CRANK PULLY MAY HAVE TO BE DRILLED. IF OUT OF A POWERGLIDE CAR BE SURE TO PUT IN A PILOT BUSHING IN BACK OF CRANK.

Should be straight forward and when you get bto puting in the 235, i am sure if what ever come's up you will be able to handle it. I have never heard of a 216 chevy eng...