11 second smallblock...how would you build it?
Start with an 80s vintage LA 360 core. Block: align hone, studded mains, square deck to 9.58, bore .030, plate hone, enlarge oil passages, Index/ grind/polish factory crank, SIR rods, SRP flat tops, internal competition balance. Heads (308 castings) new guides, cut for dual springs, unleaded seats, fit 2.05/1.65 stainless valves, 5 angle valve job, stage 2ish porting (245-250cfm), mill to 65cc chamber. .028 head gasket. I'd run some sintered iron rockers, HD shafts, solid flat tappet in the
250-255°@.050 range, M1 single plane port matched and plenum blended. Holley 4150 series 800cfm DP. Ends up just shy of 11:1 and will run on pump premium(sorry, with having to run the factory iron head you really kill any possibility of running the number with the stated support parts on low octane). The problem with running mild gearing is you have to make more power to accelerate it as fast. So instead of a milder engine with 4.30s you need a wilder engine to pull 3.91s.