Hei Distributor…which post is #1?

Installing an Hei distributor on the 318 in my Belvedere. Have searched and can’t really find what I am looking for. Motor is at TDC and when I drop the distributor in, it points at cylinder #7

Msd Ignition 8411 Distributor Cap

A-Team Performance HEI Distributor 65K Coil 7500 RPM Compatible with GM GMC Small Block SBC Big Block BBC 262 265 267 283 302 305 307 327 350 383 400 396 427 454 Red Cap, Distributors - Canada

How to find the number 1 plug wire on a distributor on a late 70 Chevy 350 engine - Quora

Number 1 on Gm HEI cap

HEI Spark plug wire??

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GM HEI Distributor w/Red Cap

HEI Firing order - The 1947 - Present Chevrolet & GMC Truck Message Board Network

in Distributors.

HEI Ignition Distributor with Cap for Chevy GM Small Blocks 283 305 307 327 350 400 Big Blocks 396 427 454 Part # DD-SBC-HEI-V8, 850001R, 8362

FAQ - Electrical: HEI Distributor Basic Diagnosis Procedure