GMC Production Numbers

[gregbr]

Hi All. I know this has been asked many times, but I'm trying to piece together some idea of how rare my 70 GMC is. I just finished a frame off resto and I want to make a plaque giving some info for use at car shows. I would love to find out how many 70 GMC Shortbed Big Blocks were built. Mine is factory BB, Shortbed, Turbo 400, gauges & tach, Sierra Grande, Super Custom Interior, non air. I have added Vintage Air, power steering & brakes (using all factory parts). Added Pics, Air cleaner top has been replaced with another one with no decals to be factory correct for shows.

Longhorn Man has supplied the following (Hope I got this right): There were approx 2038 1970 Chevy Shortbed Big Block trucks. There is a general estimate of 20-25% GMC to Chevy ratio.....Using 22.5% makes approx 458 1970 GMC Shortbed Big Block trucks. Unknown how mant were Sierra Grande.

I would love to hear any comments or other sources of info to go with this. I have checked everything I can find on the subject with little success.