Re: engine temp on steep grades I know that it left the factory with a 4 barrell carb. The previous owner put a 2 barrel on it. I am going to check out the fan clutch this weekend when I get a second and I will let you know about the carb and how I made out on monday. I don't believe they put two barrel carbs on a 454 since the 70's This engine was manufactured in 1990. Last year I thought about putting a 4 barrel back on it, of coarse this would mean a new intake manifold as well. I also thought about putting a stainless steal high flow exhaust with headers on it which would give it much better horse power and better fuel ecconomy. But it is hard to put a lot of $ into a MH I only paid $8k for. Again guys, Thanks for all of the advise!