Magnum Roller Lifters
How did they work without a tie bar between them, or no spider? I've never seen those kind. I used Morel hydraulic rollers in my 273. The oil band is lower on them than other brands of retrofit hydraulic rollers. I didn't look at solid rollers since my motor is pretty mild, but I'm pretty sure the Morel solid rollers are the same way. Both their hydraulic and solid rollers have tie bars. My cam is from Bullet and was ground on a Magnum blank because they didn't have or have any hopes of getting an LA blank anytime soon, so I had to use a Hughes cam snout adapter to be able to run a mechanical fuel pump. I hope you can get yours straightened out soon.