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Originally Posted by budgetracer
My malibu wagon is a 79-Do I run dished pistons or flat tops? I lost my Nsa and msa tech sheets. gonna look at work tomorrow. I have bracket raced my wagon for 20yrs and did fair. I hope to find out about what specs to run on cam, Can I use crane roller rockers? Thanks for all the help so far. Some of you make me not feel so lttle knowing that I don;t have much to start. I am calling this Welfare stock racing. I never live above my means, Only do this after all meds and bills are paid. Been Ill for 2 yrs now with really no known diagnosis, But sometimes having this dream to be able and run 3-5 tenths under index helps lift my spirits some. I am going to try and run the stock 7.5 posi rear for one yr.
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Do yourself a favour and change the 7.5 out for a 12 bolt. There are conversion bars avalable to put a 68 to 72 rear end in that car no problem. That seems to be the cheapest way. Theres no way around spending money on the axles, c clip eliminators and spool but that rear is still way more available than the 8.5 GN/T type/442 rear. With any kind of power, 250hp and up, a 7.5 will break, specially with slicks. A guy I know just built a really nice Grand Prix that now has a 2 foot long rubber mark and a dent in the quarter panel from the rear end breaking and the axle exiting the car. Thank god the car in the other lane was faster because it would have hit it.
Id rather run 1 tenth under the index and know that the rear end will live more than 2 passes rather than take a chance and break it at half track and hit the wall or the car beside you. Food for thought...
