Lets see some pictures of the car!!!

What is the cut off speed now on requiring approve Bonneville high speed tires?
How hard and expensive are those tires to get now?

I've been 193mph on old Moroso DS-2s, so I'm going with those (new ones). I need to get a pair of 28" tires, as my math gets me to 240+ with those and a 2.47 geared 9" rear axle. The lowest I can find for an 8 3/4" is 2.76s, and even Moroso doesn't recommend their 29" skinnies for Land Speed use. I have an old pair 29" tires with very good tread, but not sure it is a good idea to use them. I plan to use an 18 spline 833 but am not sure if it will shift quickly around 7500rpm.
Actual land speed tires are very expensive and only produced occasionally. I am confident the DS-2s will be fine at 240mph or so.

You might want to check with both BNI and SCTA tech about those tires being okay for speeds above 175 MPH
Last time I called them they wanted the Bonneville approved above 175 MPH specific tires only to get through tech, the expensive ones

I ran 193mph at Bonneville in a friend's car that cruises through tech with DS-2s, car runs straight although with a power steering box with no power, meanders around a bit. The rulebook goes with speed ratings of the tires for classes up to Z ratings. If the existing record you are contesting is over 200mph, racing specific tires are required and speeds are based on mfgr recommendations. Moroso does not recommend the 29" skinnies for LSR, but up to 28" is okay and have been tested to 300mph with an 800lb load.

I think the LSR specific tires are like $1000 each and are only produced occasionally.

Hey Cab, don't be a quitter! Four wheel drive is ok with SCTA in the 2019 rulebook in Special Construction class or Production Class if the vehicle originally had four wheel drive from the factory!

This is the center weighted Crower custom crank, and finally posting dyno numbers!

I started a new thread with pics just for you Al! Looks like a semi-junky 1970 Charger with her clothes back on!

Cab, these DS-2s were several years old and they worked fine for me to 193mph. The next time I got in the car it would "only" go 180mph...someone had broken the ceramic on the #1 plug, which fell away resulting in running on a dead cylinder. At 15:1, I couldn't feel it missing, but it killed that piston. The engine was already broke when they put me back in the car to go over 200mph, but that run did it in for sure. The 193mph run was uneventful until the chute didn't open. A lot of cars there do not run front brakes, only rears, including this car, but it slow and stopped before I ran out of track on the long course (7 miles) in 2016.