Thanks again for the replies. I'm thinking a stroker may offer the best low end torque for my towing needs, but I still want decent power up top too. I'm really leaning toward just having a crate engine built. This way I know I have the right head/cam/intake combo from the get go and won't have to worry about changing parts down the road. I was originally thinking a $5000 budget for parts, but even if that was possible, it's worth it to me to have the complete motor for the extra couple grand. By the time I have the machine work done, and all the extra time for assembly I'm coming out even, or maybe a little ahead by going crate motor.