[chuckies76ta]

Sounds like those pushrods must be binding in the heads. Something is binding. Like mentioned put it together spin it over by hand and check valve train. I have a set of 5/16" x .116 one piece Smith brothers pushrods here if interested. They have been used for a season here. Still perfect shape. The length is 9.300" I also have a set of full PRW roller rockers 1.5 Ratio with poly locks you could try. Nothing wrong with them.
Something you could try is to install just the pushrods and rockers on the cylinders that are causing the breakage. Leave all the other pushrods and rockers off. Remove the spark plugs to let the combustion air out of the cylinders while you turn it over. Check them for any visible binding.

[Jimbobeast]

Originally Posted by chuckies76ta

Sounds like those pushrods must be binding in the heads. Something is binding. Like mentioned put it together spin it over by hand and check valve train. I have a set of 5/16" x .116 one piece Smith brothers pushrods here if interested. They have been used for a season here. Still perfect shape. The length is 9.300" I also have a set of full PRW roller rockers 1.5 Ratio with poly locks you could try. Nothing wrong with them.
Something you could try is to install just the pushrods and rockers on the cylinders that are causing the breakage. Leave all the other pushrods and rockers off. Remove the spark plugs to let the combustion air out of the cylinders while you turn it over. Check them for any visible binding.

Yes, Chuck, that is what I'm going to do next. I would take you up on the offer but this motor takes 1.65 rockers. If I went to 1.5 rockers on a RAIV engine, what would be different, except less lift and HP?