Drag Racing Online: The Magazine

Volume VIII, Issue 3, Page


Check Out That Chassis

By Scott Weney of S&W Racecars

I have a 71 Chevelle that currently runs 7.80’s and would like to run it to the 7.50 level and be legal in both NHRA and IHRA. The car is currently certified for 7.50 NHRA and 8.50 IHRA. I have the SFI 25.5 publication and from what I have read, I’m not sure if I can meet the spec and still get a set of headers in the car. It is a blown alcohol big block with a Turbo 400, stock frame rails from the front to the rear just behind the driver’s seat. The engine is in the stock location. Right now I have 2 1/8” headers that won’t fit with my new mid-plate so I ordered a new set of Lemon Headers with 2 ½” tubes, two that go over the frame rails on each side.

Specifically, the area of most concern is the addition of the foot bars in the front. In the spec, they are listed as 6A, 6B and 6C. I can’t see how I can get the bars in with the mid-plate, stock floor, frame and headers. Any suggestions on getting these installed besides sliding a new chassis in the car? Thanks.

Tom Dwyer


This is a big problem for a lot of people now that more cars have to meet this spec. The easiest way we have done this type of job is to take the stock rail out of the middle section of the chassis and tie your rear section to the front frame rails with the rails that are in the spec. This will also give you more room to run bigger tube headers under the car. Please call me if the have any questions on how to do this.

Scott Weney
President, S & W Race Cars


Ask the Experts!!
Submit your tech question to Scott Weney here.
Full Name: Location:
Email Address:

Your Question may or may not be chosen to be published on this page.

You can also email Scott Weney at chassis@dragracingonline.com


Check Out That Chassis [2/8/06]
Scott Weney will straighten out your chassis problems

Here's What's New!