Swapping out a Voodoo

I last ran in August 2018 and it came home sweet. Dropped the oil and filter drained the fuel (methanol) refilled with the same weight and brand hi zinc oil. Checked compressions and left it until last month. Fired it up running okay. Decided to pop a head off an check the head gasket 'coz a couple were down a bit. All okay except in 10 mins of running the oil went black. Looked over the cam shaft and bugger me if no.6 wasn't crook. I wonder if the lifter didn't jam in the block and not rotate or if just sitting for 11 months and all the lube had disappeared? Either way it's a scary thing these days. Most rollers seem to have a bunch more lift. I sent details to Howard cams and a local but didn't get s recommendation from either. I might even use a HR with solid roller lifters and give it some clearance. Going to contact Hughes next.