so i have a 91 LX with a 5.0 and i have a 351w that was rebuilt a few years ago and has about 10k mi on it. I want to do a swap but i am not sure if i want to use this block, the block is a 75 and uses flat tappet cam. Would i be wasting my time? i would have aluminum heads trickflow intake ect... all the good stuff, so my question is should i find a newer block with a roller cam? i know you can make alot more hp with a roller cam but this engine is just sitting there. My friend told me not to do it because of the cam and i know i can convert it for big $$ i dont want a race car but just a nice reliable fox with a swap done the right way. any advice? thanks