I would like to know if anyone knows the difference between the 140 & 141 heads, different websites say different things. The 326 was suppost to have 250 HP, and the 326 HO was suppost to have 285 HP; the HO had a 4 barrel carb, dual exhaust, and different heads. I now have a 4 barrel carb, dual exhaust, and headers. I must be close to the HO rating. I am thinking of changing the cam, and rebuilding the heads.
I don't think that I will 'mind' the 326, I just wish it was a bit faster (stock). I had a Nissan Altima 3.5SE, 5 speed manual that was suppost to do 0-60 in 5.9s, and 1/4 mile in 14.4s; I would hate to get smoked by someone in an Altima, I guess I just have to accept the car for what it is. I think that the Altima would smoke a lot of the 400 cars too.