318 LA rebuild after losing a valve seat

nm9stheham said

I answered you PM on the base circle question and valve overlap.

If you are using the same rockers as before, then a length change of 7.500" to 7.125" does not make sense.

• They may change a bit with the individual heads, but I cannot think of anything in the 302 heads that is so different that the pushrods should change so much.
  
• The cam might be a bit different in base circle, but really should not be anything like that.
• The valve could be waaay too long but that would mean they are basically wrong.
  
• Lifters very different? AMC's?

What am I not thinking of, guys?

Click to expand...

OK GUYS, here is another stock component 1969 318 build with the 302 Heads, stock pistons, stock pushrods, stock stamped steel rockers, using the Mopar Performance 340 camshaft.

The stock 69 valve relief flat top pistons sit .040 ths. down in the hole.

.028 ths. head gaskets, 340 valve springs were installed after breaking in the cam.

All assembled and running, no interference issues with valves to piston tops what so ever. Runs out very nice and great performance.

Stock Mopar Valve Train: