Need to know stat...m-body 8 1/4

Well I wasn't sure what a M-body was until I looked on Allpar. According to them F, M, and J bodies are all identical. That being said it should be a direct bolt in. I also compared track widths to verify this and again according to what I found on Allpar's website both A-bodies and M-bodies show identical 58.5" rear track widths. I couldn't find anything on the spring mounting pad width so this may be different but that will be minor to change. As far as them handling 350 hp. I think you should be safe there from everything I've read. I've read where several guys that say they're running that much and having no trouble with them. I ran one in my old Dakota that I raced for 12 yrs. on weekends. It wasn't 350 hp. More like 280 hp. but the truck weighed alot more than an A-body so that makes up for alot. I never had any problems with it. Sold it with 90,000 miles on it still going strong. As far as price goes. The 8-1/4 goes for $150-$300 complete usually.