6.5 heads on a 6.2

[nate_o23]

Will 6.5 heads swap onto a 6.2 engine?? Is there any advantage or disadvantage to doing this?? Thanks!

[billschall]

Will 6.5 heads swap onto a 6.2 engine?? Is there any advantage or disadvantage to doing this?? Thanks!

read this.
http://www.thedieselpage.com/members/gmheads.htm

[mstockton]

i put new 6.5 heads on my '82 6.2 and couldn't be happier about the way they perform, they really helped the performance, fuel economy suffered a bit, i think once i get my gear ratios worked out i'll be getting close to 20, but not as nice as the 24 or so i was getting before the head swap.

-Martin