I used Pre68 Daves relocation plate and it works very well. I feared drilling into the block but one day, after drinking a few cans of courage, grabbed the drill, took deep breath drilled, tapped and mounted the 216 water pump on my new 235 block. installed 216 fan and have NOT regretted it since. My cooling temp does not exceed the 180 degree thermostat installed even after driving the engine very hard in 95 degree weather. Jerry
