Damn good info

It's no big deal, but its funny....to read people accept the magnum and over look the springs while they would never do that with the older LA motors. Nope... its ..."i would be changing the springs right away and sliding in that 256 or 262 cam and lead footing it off into the sunset..."
So I wanna know if these people are really tossing in a magum engine and just driving it with the stock cam and springs of which 'the stock springs are done and floating after 4500 rpm' while the stock cam is still there till about maybe 5200 rpm. 1st thing I did was change the springs and put some heads on. It pulls into 5500 range now.

My advice to all you guys buying one of these engines put it on the stand , change the oil pump , timing chain, remove heads and do the spring work whether changing the cam or not. It will turn more rpms qith more spring. The 986 comp double 1.437 is a good one to about .500 lift/55-6000rpm, after that get a better spring with more open. Those are only about 290's lbs open but have 130 seat lbs.
I would not put 500 into any stock casting magum head...so be sure they are good to begin with.. if not, get after market sm,eq,rhs,etc