I will be starting my build in the next couple of weeks and plan on using the roadster as a street car that is taken to a couple of track days a year. I will be using a mark VIII 4.6 and IRS rear. Im looking for recommendations for transmissions, rear ratios, p/s or no p/s, tire size, ect... Any input would be very welcome. I will be using 245/45R17 up front and 315/35R17 summer tires for the street and will probably have a second set of wheels and tires for the track without a stagger. I understand that some have had probblems with getting there cars through tech with only one roll hoop. I will probably build with provisions to add the second roll hoop for those days Im at the track and remove it and install plugs when I am just driving it on the street. Does anyone have any experience with making and installing removable plugs? I have seen some pics like the one Im attaching but havent heard from anyone that has actually made them or used them. Thunderbolt raceway in NJ will be the home track. Does anyone have any track specific setup information? I ran my RX7 with 4:10 rears and had to lift on the long straight to keep from bouncing off the rev limiter. My tire diameter on the cobra will be significantly bigger but my redline will be about 1500 rpm lower. ...But exit speed and rate of accelleration and braking point will all be different as well. If anyone can give me info on top gear ratios for the different 5 speeds and recommend a decent rear ratio that would help immensely. Im not looking for ideal setups I just want something close because once its built i dont plan on changing ratios.
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