Workin on a new project these days. Picked up an '87 Mazda B2600 for free. Motor is done- No head and the cylinders have been providing residence for a family of rats. So I'm tryin to figure out what I want to do about repowering the thing. The 2.6 that came in it was only rated at something like 107hp. The plans for the truck are one tons, 44"+ and a low crawl. More crawler than anything else. Anyways, the engine compartment is obviously very small...I'm lookin at either a 5.0 out of a late 80's early 90's mustang, or a gm 4.3 v-6. I know I could make a 4.3 fit no problem...But what about a 5.0 ford motor? How big are they physically? How much does one weigh? Is there such a thing as a "small" v-8 that would be relitively inexpensive to aquire?