On a 450 HP (on paper) engine..

Daz

 

I picked up a tenth by switching from TES's to hedman full lengths. If you are interested, I may have mine and a custom Y-pipe to hook up to a catback for sale.

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Black 89 IROC...Mods: 355, 10.5:1 comp, Big Solid Crower Cam, TFS heads, Victor Jr, Holley, and a 5 spd...

 

I ran the 1 5/8" full lengths on my 383. I only ran open headers so I have no idea how to hook a full exhaust up to them. I got some short down pointing dumps made for the headers because the driver side one would have blown exhaust on the side of the tranny (TH350).

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley