Sig Monson’s Award Winning Hemi Powered Glasspar G2: MoPar Parts ‘n People, 1954

Hi Gang…

Back in 1952, Sig Monson – already a custom car builder, hands-on automotive man, and automotive dealership owner – was one of the individuals who read about the new fiberglass bodied sports car trend.

But…being that he lived in Minnesota, there were few opportunities to see one of these “wonder cars” built from the “carbon-fiber” of its day – fiberglass.  So Sig did the next best thing he could do in 1952 – he bought himself a fiberglass body can went straight to work.  And what he built was magnificent  – a Chrysler Hemi powered sports car tested at 130 mph and capable – he believed – of doing at least 140 mph.

Let’s learn more about this special Glasspar G2 as reported in MoPar’s 1954 issue of “Parts ‘n People:”


MoPar: Parts ‘n People: V6, N3, 1954
Winner of Two First Place Awards
Features Chrysler Firepower Engine

This sleek continental style model was built in his spare time by Sig Monson, who divides his time between the parts and service departments of Monson Service, Inc., Dodge-Plymouth dealer in Duluth, Minnesota.

Approximately 2600 man hours went into designing and constructing the car which has been awarded the first place trophy at the 1953 Speedorama in Minneapolis and the first place trophy at the St. Paul Auto Sport Show in St. Paul, Minnesota.


The car is powered by a V8 Chrysler Firepower engine which, with modifications, develops 250 horsepower.  The body is fiberglass, and has 28 coats of bright red lacquer!  The top is black and is trimmed in gold.

Mr. Monson has driven the car 130 mph, and estimates it will do 140mph.  Despite the extreme speed, he doesn’t become nervous, he says, since he’s had years of experience at stock car racing.


Yes that’s right – Sig estimated he spent 2600 hours to build this car.  That’s more than a full year of 40 hour weeks – and that’s already starting with a body built by Glasspar!  So where is this two-time award winning car today?  Stay tuned to Forgotten Fiberglass to learn the rest of the story…

Hope you enjoyed the story, and until next time…

Glass on gang…


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