Ohiowoodchuck,
I have not seen a Mopar W2 econo shaft before and whether they are banana grooved or drilled for pushrod oiling. I can tell that every Mopar W2 race head W2 rocker arm shaft that use the offset drilled blocks are banana grooved but the intake rocker arm's pushrod oiling hole is in the wrong place. Mopar based the race W2 shaft on the TA shaft which puts the oiling hole ~ 1/4" away from where it needs to be. See my PM to you on how to get the right oiling from the shafts you have which are banana grooved thick walled shafts with removable plugs.
1. Machine each of the hold down holes larger by 1/16" to allow use of the required 3/8" hold down fasteners
2. Groove the ductile iron bronze bushings, both intake and exhaust rocker arms, from both the the pushrod oiling hole and the hole for the rocker tip oiling. For the exhaust rocker arms, since the pushrod oil hole and the rocker tip oiling holes are in line, you groove down from the pushrod oiling hole to the bottom of the rocker and keep going up to the valve tip oiling hole - a semi circle. For the Intake rockers, you need to make two separate groves as the pushrod oiling hole and the valve tip oiling hole are not in line with each other. For the intake rocker arms, make each of the two grooves descend down to the bottom of the rocker where the banana groove location is so the two grooves intersect and stay in the position where the banana groove sits at rest and when it is in motion to get oiling out the holes during the full sweep of the rocker arms.
3. Measure your finished engine for pushrods and use a pushrod with a "V" shaped 5/16" pushrod cup so there is plenty of room to catch the oil coming off the rocker arm oiling hole
This will work better than any shaft Mopar made for W2 econo or race heads to get oil to the push rods.
I have used this method for my own heads with success and it has also worked for member SSK Karg. Many of you will recall the issues he had with oiling his rocker arm adjusters.
Shops like Rocker Arms Unlimited in Redding California can groove your bushings and they can also mill the shafts as well. I have sent several others to them to do this same process for W2 heads.
The other option is to also use pushrod oiling as well as the shaft oiling. You will still need to do step 1, above and drill the shafts for the larger 3/8" hold down fasteners but you will not have to groove the rocker arms for push rod oiling and the shape of the pushrod cup is less critical.
Contact me if you have any questions.
