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Re: Fat Blocks and Rear Ends
Personally if it were just for street/strip use, with street tires, i would just keep the 12 with minimal upgrades and use my funds elsewhere. Strip occasionally, even with 10 or 11.5 et streets, street gears ie 3.73, and stock suspension prob last a good while mabey forever? BUT... I wouldnt try beating on it with listed components then one day decide to go Big tire (31x18.5), 5.14 gears, and good drag suspension setup ect., on same 12 bolt expecting it to surive.  Ask Me How I Know, been there, done that, and got the sh#@ on the ground to prove it. 
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'71 LWB c10-" WORK" in progress
385 ci 4 bolt (4.040 bore), scat 6.0" forged h beams,scat forged crank 3.750, speed pro 5cc flat top, clevite bearings, .039 head gaskets,comp xr288hr 110* 288/294adv. 236/242@.50 555/576 lift, pbm hyd roller lifters, chad spiers 215cc imp. heads , comp 1.6 roler rockers, comp magnum push rods, edelbrock victor jr. single plane intake p&p (1206 gasket matched), quickfuel 750R DP , th 350 trans, 5.14 gear, 3000 stall
2012 best 1/8- 7.70 @ 87mph 1.70 60' (lil better)
2013 best 7.39
2014 best-7.38
New for 2013-strange rear coilovers, headman 1-3/4 headers, 5.13 r&p, .060 aluminum bed floor, 15x14 holeshots w/ 31x18.5 hoosier dot pro's, 15x4 holeshots w/ 26x5.5 m/t skinnies and 200+#'s in body weight loss & 6 point cage
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