My buddy had a driveability issue on his T/A this weekend, and we found out that two of his valvesprings were broken, one in 5 pieces. Drove it here over 90 miles like that. Valve was hanging open 1/4" too. Luckily, we pulled the head off and there wasn't even any piston to valve contact .The springs look stock to me, they're at a minimum stock retainers, seals, seats and locks. Valves are also stock. It's a longrod 355 running promag 1.6's and a cc305. Anyway to tell if they're stockers, or ex-612's? Just trying to figure out what happened here...