I've picked up a 400 block and stock heads. I'm planning on putting it in my 1973 Holden Kingswood and wanted to get some feedback on what intake, carb, cam etc to use? I was thinking of using a holley 750 vac sec, Edelbrock performer intake, th350 with 2000 stall, 3.55 diff gears and 265/50r14 eagers. No idea what cam to use? Any guidance / advice appreciated. Karl
Karl, In my experience,if you're after any increase in performance,or plan any upgrades in the future,skip right over the Performer intake,and go straight to the Performer RPM. The Performer is basically just a stock intake cast in aluminum instead of iron,but the RPM is like an improved Z/28 intake,designed from the ground up to work well in regular driving and when you spin the tach up too. The 750 will work well on a 400,and make sure your distributor is nice and tight,with no slop in the bushings/bearings,and have a local shop check to see that your combo of weights and springs are right for a performance application. For a cam,if you want to go a little cheaper than a roller,but still have really good performance,I would wholeheartedly recommend the Isky MegaCam series.They have a little more hp and tq on average than the equivalent Comp Cams Magnum series cams,but they are very close,spec wise. I would run a 280 MegaCam in that 400,but you could step it down to the 270 and still have LOTS of performance,and with the ci of that motor,you will make lots of torque,which is where the fun is on the street anyway. Aside from that,make sure you get the new,recommended valve springs,and don't be afraid to try your hand at porting a junk head out of the machine shops s**** bin for practice!Porting is free horsepower,and its not too hard once you get the hang of it.Just remember to start out slow,and stop and think once and a while so you don't get carried away. Scott Posted using the Full Custom H.A.M.B. App!
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