Switching from an externally oiled cam to internally oiled??

[Da Flash]

I switch the cam (externally oiled w/spraybar) on my N42 head to an internally/drilled cam, I've seen conflicting views on whether to run the spraybar. Some say it's fine as long as you run a high volume oil pump with it (I am) and some differ on that opinion,

Could I run without the spraybar by just blocking off the spraybar holes or, do I have to use the cam towers from an internally oiled cam??

Any and all suggestions are appreciated!!

[hls30.com]

I converted the blue 2+2 in my gallery long ago when the original tube blocked and wiped the cam and several rockers. I replaced the damaged parts ran the internal oiling (blocked off the tube holes) with the original oil pump, the engine ran an additional 227K before giving up due to a burst radiator hose while accelerating on the high side of 100mph-then I went to an L28ET.

Will