Had one in my 68 camaro close to that. Also built a chevy 302 (327 with 283 crank) that could turn 10k. You have to use pink rods to help keep it together. It was for dirt tracking.
Shuf those chev 302's were sweet engines,69 Z28's had them for Trans Am racing and GM had to put them on the street. IIRC they stated 290 hp on the air breather...hahahahah.. ya at 2700 rpm they made 290,never reved 1 to 10K but saw 9200 on a dyno with a street legal store bought Z28.
Oh and I think it was pushing the far side of 430 hp,not bad for such a small mill!
ps: shuf I need 1 of those added to the blender your fixing,maybe thats the prob.... errr more power!