Can anyone tell me what they paid for the labor on new manifolds and risers? This is for twin 454 Crusaders FWC. The materials cost seems to be around $1500, but a marina quoted me $1000 Per Engine (that's 12.8 hours at $78 per hour per engine). Seems ridiculous to me, laughed when the guy told me and this is a Crusader shop. I've done it on my Merc 454 and din;t take me 4 hrs.