383 and 440 main Caps?

[Portsider44]

Guys I pick up a couple of big blocks the other day. One a 2/1969 cast E383 short block. The other a 10/1972 cast J440 HP.

Both blocks had the main caps removed but I also found a container that had 2 sets of caps plus 2 extras. One of the extra looks like it spun a rod and has quite the lip in it.

Looking at the 2 matching number sets they are identical. Anyway to figure out which set belong with which block?

One set are all stamped 25 the other are stamped 28.

 

[DetMatt1]

The 383 crank has smaller journals so place them into the block to see which match up.

 

[aussiemark]

You could fit the caps to the block and torque the bolts down then with your fingernail check for a step or mismatch between the cap and block tunnel where they meet. This will be a quick way to see if the caps belong to the block running a bore gauge through the tunnels would be more accurate or if you have a crank and bearings install them and check if it turns smoothly.

 

[oldkimmer]

There is quite a difference between the crank journals 440 will have a bigger bore. U can see it by eye. Kim