MDchanic

Dumb question:

I've seen mention of a 350 weighing 560 pounds, a 455 weighing 620 pounds, and a 425 weighing 660 pounds. Does this sound about right, or is it one of those "incorrect" pieces of info?

I'm impressed by the 40 pound difference between the 425 and the 455 - lots more casting there, I assume.

- Eric

Run to Rund

Forged crank is about 6lb. more than nodular, and the longer rods of a 425 weigh a bit more. No 40 lb difference, though. With or without exhaust manifolds, iron or aluminum intake, stick or automatic flywheel--those are the bigger items. If the 455 has the aluminum intake, and the 425 has the regular iron one, well, there is almost 45 lb. difference between them due to the crank and intake.

Redog

I've heard the 350 weighed in at 560 lbs too (with an iron intake manifold), but I heard 700 for the 455

MDchanic

Thanks, Run, that's more or less what I was thinking, but I didn't have any numbers to back it up. With the block having the same bore (only significant difference between production blocks being the lifter angle), I couldn't think of anything that would add up to 40 extra pounds.

... And, yes, I know exactly how much a cast iron big block manifold weighs :insert hernia emoticon: .

- Eric

507OLDS

From my experience with shipping 455's,I have entered the total weight of the engine,on the pallet,at 675lbs(as a guess),and they haven't told me that they weighed more,when they got weighed at the stations.625-650lbs is a good estimate for a stock 455.