About 3500-3700 (75 means 82 right?). I have original radiator but a tandem tranny cooler tied in. All cast everything and a 650 on top. Dyno around 370@ 4k
13 seconds consistently
Interesting peak horse at just 4k for a 340. Must be your cam, but probably makes it much more streetable than my setup. I bought my engine as is, but thought about dialing it down a bit for more street ability.
But...I'm dying to see how it will run as is and then after that it may get reworked a bit.