[wtm442]

The main jets supplied from Holley on that carb were 71's but the secondaries were 85's. Since the secondaries are used under full power, and a big jet size, they really do not need a power valve in the secondaries. Many carbs from Holley have a secondary plate without a power valve, or a secondary metering block without a power valve.

The hole in the plate is not "blocked" off, rather, it was never machined for a power valve.

The power valve in the primary side does the power enrichment, along with the accelerator pumps helping during the transition to WOT.

I'm assuming there is a power valve on the primary metering block. If not, the previous owner removed it and installed a plug for some reason, or used a secondary metering block instead of the primary metering block, just to get the carb assembled for sale. That would be weird, and you might have some problem without a power valve. Maybe not. If this is the case, I would send an e-mail to the seller.

The primary metering block (supplied by Holley) would be number 134-229. The secondary metering block was number 134-230

The 3395 you mentioned is the date code ... carb was built in the 33rd week of 1995.

I have no idea what the 11398 number is for. All Holley metering blocks are numbered 134- with either 1 , 2 or 3 digits after the dash.