Who is Period Correct?

Paul Proefrock

My passion began many years ago – a college kid in Southern Illinois, seeing a Cobra in a Ford dealership – and it became focused years later when I started my Hurricane big block replica build. Wanting to pursue as accurate a reproduction as possible, I found that many of the components were no longer available – or so pricey no one could afford them.

A lifelong gear-head, I combined my skills and training in art, engineering and marketing to research and develop the items I needed for my build. Many asked if I would supply pieces to them, thereby starting “Period Correct, LLC”, a company to supply affordable period correct components for the replica Cobra market – Shelby Cobra replica parts and accessories.

Our products can be found on many replicas around the country, and to my pleasure, on a number of notable original CSX cars. Oh, and my Hurricane builds? Build I has found a new home in Louisville, KY, and Build II is out on the road, looking for the next adventure. Build III is a new, period-correct GT40.

In September of 2025, we were acquired by Acton Custom who will be adding our products to their catalog. The move is underway and I am now chasing my dream, full-time.

They’re never done. And I’m enjoying every minute. Want to see what I’m doing, take a look at 65SHLB.com

And my latest adventure:

 There’s a RCR GT40 Mk1 now sitting in my shop, consuming much of my attention. Small block Ford w/ Borla EightStack

Hurricane Gen II build.

Bored & Stroked Alum. Shelby Side Oiler FE (468″), EightStack Injection, LibertyGears TKO600, 2015 Mustang IRS, Trigo 15″ pin-drive wheels

This is my second build, utilizing the things on learned on my first, even more detail to ‘period correct’

Things haven’t changed: the hardest part of building these is picking a color combination. This choice of Saleen ‘Lizstick Red’ is very eye-catching.

‘Yea, and for a while, there were two

Hurricane Gen I build.

Bored & stroked Center Oiler FE (432″) EightStack Injection, TKO600, IRS, Trigo 15″ pin-drive wheels

Put on the road in 2010 and driven regularly. This car now resides in Louisville, KY. Fond memories