Burkey pointed out this Camaro pace car with a plexiglass bubble on the hood, the 1967 Camaro Cherokee. The blister shows off a Mark IV 396 complete with four dual weber downdrafts.

1967 Can-Am Road America, the driver is the Can Am spokesman, Stirling Moss

http://www.diecastxchange.com/forum1/topic/185130-pro-sports-racing-cars-wanted-in-118th-updated-52116/

Originally built as an SS/RS convertible with the 396-cu.in. Mark IV big-block V-8 engine, the Camaro went directly to the GM Styling studios to be customized under the direction of GM design boss Bill Mitchell to help generate publicity for the then-new Camaro.

 Alterations included split bumpers front and rear, a seamless ducktail-style rear spoiler, a hood tach, driving lamps and a special domed hood fitted with a clear Lexan top that displayed the big-block engine, which had been swapped to the hotter L78 375hp version of the 396, fitted with a quartet of Weber down-draft carburetors mounted to a Moon intake. Turbine-style wheels styled after those used on the Corvette were also fitted. The restyled body was then treated to a custom candy-apple red over gold metalflake paint finish and dubbed the Cherokee.

http://justacarguy.blogspot.com/2017/01/new-images-of-cherokee-ss-camaro-mark.html

http://www.deansgarage.com/2016/1967-canam-road-america/
https://blog.hemmings.com/index.php/2013/11/27/freshly-restored-one-off-cherokee-camaro-debuts/
https://www.mecum.com/news/2009/02/09/mecum-auction-to-offer-special-1967-camaro-cherokee-styling-car/2075/