i have a stock 76' 350 in my 84 blazer, it has an aluminum intake, 1inch carb spacer and a 600cfm edelbrock electric choke carb with a 6inch k&n filter and stock exaust manifolds into 2inch duals into 3inch flowmasters and tail pipes, sm465/208 and 4.10 rear axle now while i am installing my detroit and seals etc. in my 4.56 14boltff. i am running 39.5 boggers and this thing is a dog right now, this is a newly installed motor i picked up, i have no idea how many miles are on it, but this thing is a dog, as soon as i put it in 4th gear it falls flat on its face, i have to cruise around in 3rd all the time to get the thing moving. what should the timing be set at? it is currently at 6degrees.