Street Machine - - Legend -

LAUNCHED at the be­gin­ning of 1974, Pro Stock was in­tended to find a place for the hard-headed old Su­per Stock rac­ers who didn’t want to switch to hand­i­caps. The rules were fairly re­stric­tive, sim­ply al­low­ing ex­ist­ing rac­ers in Mod­i­fied Pro­duc­tion classes to add a fi­bre­glass bon­net, boot lid and guards for a sim­ple swap across. Bod­ies had to be Aus­tralian-man­u­fac­tured from 1967-on us­ing en­gines orig­i­nally avail­able for that ve­hi­cle.

The rules ap­peared to pro­vide op­tions for Holden, Ford and Chrysler cars and by rights should have brought out a bunch of com­peti­tors, but after a small flurry of ini­tial ac­tiv­ity the num­bers be­gan to drop away. When Noel Ward de­buted his XA Fal­con in May 1975 and went 10.37@131mph at a time when the na­tional records stood at 11.25 and 120mph, the bot­tom fell out of the bracket.

While US Pro Stock rac­ers had op­tions with big-block en­gines, the lo­cal au­thor­i­ties stuck firmly with small-block power, which made for a great dis­par­ity in per­for­mance. Un­der pres­sure from rac­ers, they did grad­u­ally re­lease the reins on struc­tural lim­i­ta­tions, and by the 1990s these ve­hi­cles were quick enough for the NHRA to use them as a model to es­tab­lish its Pro Truck class.

These days the vast ma­jor­ity of Aussie Pro Stock ve­hi­cles use the swoop­ier two-door body shapes from the USA, but the small-block for­mat re­mains firmly in place.

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