its about 350
Yes.
yes
yes but it has to be 83 or newer
No. The 400 is externally balanced and requires it's own flywheel.
No. Standard 350 engines have 4.00" pistons, standard 400 pistons are 4.125".
on a 1972 sbc 400 cid 4 bolt main engine the torque is main bearing inner 70 lb ft outter 65 lb ft
It should work well.
.030
The main journals need to be turned down.
It has 90 h.p. at 8,500 rpms.
377
no you cannot. most engines .06 overbore is usually the safe limit. on a 350 .06 only gives you 10 more cubic inch. to get to 400 you would need to bore and stroke it. which gets very expensive. youd be better off looking for a 400 from a donor vehicle.