I will also be doing the same thing. I do believe that the block does fit right up in the frame with no issues. However I will be using a short block and using the 1100 heads, clutch and electronics from the blown motor onto the 1000 motor. Going this way because I have a 1000 motor and an 81 standard that I got for nothing that had a rod or something make a nice hole in the top of the motor for the previous owner. I hope it works......