Me and my dad just got the HEI working good, put the plug wires on just havn't gotten the plugs gapped yet. We were doing some power timing and it ended up 8* BTDC was probably the best run but now that it's in, it won't smoke the tires like it used to, so that's how we know it has lost a lot of the low end it had. what should we do to get this to run like it used to? is messing with the mechanicle weights what we should be working with? thanks in advance.