Price: $1900. Selling a complete intake to pan 1966 Buick 425 Nailhead engine. Will need rebuilt, but it's a good core (no obvious cracks-came from AZ and has been in SoFlo for the last 15 years). Currently .030 over, will need to go .040-.050. Heads are good cores, comes w/ rockers, oil pan/pickup, dist core, set of valve covers, valley cover. Roller Camshaft Duration @ 050, 242/248, Lift, 584/579. 9L engine has a cast-iron block with 102. uproxx. 3/262 96-08 MARINE ENGINE ATK DM07 CHEVY 305 MARINE ENGINE ATK VMC7 CHEVY 4. 400 low exhaust Along with the LM7 and LQ4, they were the first LS truck engines. 74 x 3.