you need a casting number some have thicker walls 2bolt vrs 4bolt mains ect.
Hopefully someone with the correct answer will improve this answer, but a shortblock weighs 290. That is a 350 block with crank, rods, pistons, and cam.
Assembled iron long block with hypereutectic pistons, pink rods, aluminum heads and intake, no carb, no distributor, no exhaust, no oil: 364 lbs.
3300 pounds without turbochargers
A larger block will weigh more, a smaller block will weigh less. Also, kilograms is a unit of mass, not of weight.
It would weigh 10kg.
Just the short block, about 300lbs.
with or with out
8" x 16" Cinder block will weigh just under 30 lbs
about 685 pounds dry
Aluminum block weight- 120lbs iron block- 204lbs
Roughly 550 pounds dry.
In a word, yes. The only difference between 250 and 400 engines is the top end, so you just need to replace the pistons & cylinder head etc. As far as I know the crankshaft is the same. Hi, crank actually has a different part number, probably, (and this is a guess) the balance factor will be different as the pistons wont weigh the same as a 250's. Don't forget top end includes carbs ;-)