This past month has been a wonderful roller coaster. I am 20 years old and you can call me Austin. I have heard my dad talk about how back in 1984 he had a 79' F100 with a 460 that was a muscle truck type of deal. as I grew up I began looking and I drove by this lot for a few months and saw this 1979 F100, but it wasn't for sale. I drove by one afternoon and saw a for sale sign, and my dad and I went and took a look. Here I am now with my 1979 F100, but the 351m engine is blown. I found a replacement 351m for 75$, and wondered about getting more cubic inches. I know the 351m and 400 are very similar, but I was curious can I swap the crank to a 400 and get different Tmeyer Inc. pistons? Nobody ever says "yes" or "no" just a lengthy response that gives very helpful information. Just looking for something definitive so I can have a nice compression and decent performance truck. It is also my first engine rebuild, but my dad has rebuilt numerous engines.(I am new to the forum so bear with me).