I used these Beehives first, they were the earlier ones and they were terrible from the start with the XFI lobes.
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Then I upgraded to the latest, greatest Beehives and they are the ones that worked OK at first but soon died. These were the ones that appeared to be peened or shot blasted.
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Here's the new engine, LT4 with a solid roller/ 12:1/ and it's been running at the top end of the Optispark's limits in my Impala. I don't expect it to float a valve. This one should be making about 550 crank horsepower and I'm going to put it in a 95 Corvette ragtop that I just bought in December. Waiting on headers and a torque converter. The old 420 RWHP hydraulic engine is going back in the Impala. The LT4 engine has the LT4/LE3 heads (215 cc) and doesn't have the torque of the old hydraulic engine. I've not had it on a dyno but I know the torque isn't as good as the old LE2 engine. It will have more than enough torque

for a 3300# Vette but the 4400# Impala wants more.
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No more Opti, what a shame.
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Again, I've been there and done what you are going to attempt. The Beehives worked well for a while and maybe the folks that didn't have trouble with them were not running the dog snot out of them on a regular basis. I revved to 6500+ with that engine, maybe they didn't. If your going to expect to see 7000 RPM definately get a dyno tune and keep an eye on them. I threw them in the trashcan and wouldn't even sell them on E-bay. I couldn't screw someone like that. Good luck with your build and be ready to wear the biggest grin you've ever had.
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