I think the sound and performance of the SGF70 transverse system is great. Just don't expect it to just bolt on and fit without a great deal of tweaking-especially on a 1977 model.
I had to re-jet the carb after the system installation due to the much higher flow of the system. Once that was done, the car responded well.
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1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey
1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles
2017 Sierra SLT 1500 Z71 4X4 
2019 Canyon SLT Crew 4X4 
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