I have an SSR , it's built on the same chassis as yours .
Being a convertible it has a lot of cowl shake .
Their is a company called
http://simple-engineering.com that has a lot of fixes for the SSR . Some may apply to your build , like Chassis stiffening plate under the engine and a double tube cross member .
I'm also a member at
http://www.ssrfanatic.com
Here's my SSR
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Glen & Jane's Rides
‘57 GMC NAPCO Long Bed V8 4 speed Bought 2008
7 other cars & trucks , 5 trailers
'56 Chevy Long Bed I6, 4 speed Bought 1990 Sold 8.22.2020
’56 GMC Suburban Pickup V8, 4 speed Hydramatic Bought 1996 Sold 10.11.2020
My Other Tinkerings
http://67-72chevytrucks.com/vboard/s...75#post8967275