What is this stuff?

[halfafish]

I'm purging some stuff for free but I can't give it away if I don't know what it is.

I have 8 rocker arms and 16 pushrods. The rockers are similar but look to be mirror imaged. There are four of each. The pushrods look all the same.

I have a round thing. It's about 4" across. The big hole is about 3/4", the small holes are about 1/4".

Anyone have a clue? They were in a mangled parts lot box with 360 written on the side.

There is a set of t-bars (not for sale) but the numbers make no sense. 318 and 328?

 

[Bewy]

Hard to tell without measuring, but p'rods seem pretty long so probably 440.
Domed plate could be out of an oil filter.
T-bar #s are probably the last 3 digits of the part #.

 

[Dana67Dart]

There is a set of t-bars (not for sale) but the numbers make no sense. 318 and 328

How long are they and what's the numbers on the other end

 

[4spdragtop]

The filter plate mounts to engine and there are 2 different types, magnum and LA.

 

[413]

318 = 31st week of 1968 or 1978
328 = 32nd week of 1968 or 1978

Look on the other end of bars for a 3 digit number that is part number will say what body and what engine.

Rocker arms have a right and left, so yes mirror image. Can't tell if BB or SB from the photo.
How long from end to end?

Same with a pushrod, how long?