I agree, yours does seem like it has more loap to it. It sounds hotter than mine. I couldn't find the 284281 numbers on the cam, only the one listed in my picture. It does currently run an H pipe.
I suppose it is possible that it might have had Hi-intensity lifters? I can't recall if the lifters had a wire clip or the tru-arc style clip. This cam and lifter set was in the engine when I bought it. The engine had sit for many years after rebuild. So, I took it all apart to check everything, had the block honed for the forged pop up pistons I wanted to use and reassembled it. The lifters seem very quiet at idle. Do the Crane Hi intensity lifters make noise similar to Rhodes lifters?
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