International SyTy Registry

GMC Syclone, Typhoon, & Sonoma GT History and Data

Going for a Joy Ryde
We all know and recognize the Syclone as a boosted V6 truck that willingly lays down 300HP in stock form and will make most muscle car owners momentarily think twice when one pulls up next to them at the light. But when todays muscle cars come from the factory boasting...
Project ZS-1

Project ZS-1

Projects Nov 25, 2014 0

Project ZS-1 begins as Dennis Harmon begins a new build on his Syclone. Purists brace yourselves, this monster is going V8.

V8
Another JoyRyde
We’ve featured Tom Joy’s LSX iron block truck here on ISTR and love seeing it in action. Some recent footage of Tom’s Syclone #354 was featured at the Street Car Takeover in Maryland where Youtuber BigKlieb34 takes a few minutes to speak with Tom about how he got his... Read more
Going for a Joy Ryde
Project ZS-1

Project ZS-1

Projects November 25, 2014 0

Project ZS-1 begins as Dennis Harmon begins a new build on his Syclone. Purists brace yourselves, this monster is going V8.

Read more