406 rebuild questions...
I’ve been lurking/reading here for a while now, but this is my first post. I recently bought a ’73 Vette that I’m going to restore that has a 406 small block. The previous owner said he mainly ran 1/8 mile with it. When I rebuild the motor, I’d like to make it a little more mellow for street driving. The car does run great and the compression check ranged from 162-172. Can I get away with just a milder cam kit? I called Comp Cams. They suggested a 12-211-2 or maybe a 12-240-4 (to help with the vacuum). Maybe I should also be looking at swapping out the single plane intake? I’ll never take it to the strip…only around town weekend driving. I appreciate any help…
Here’s the current setup...
406 small block (1970 400 +.030)
9:1 compression (per previous owner)
Speed Pro 7066P pistons
Competition Cams 12-214-4 (http://www.compcams.com/Technical/Se...umber=12-214-4)
Victor Jr. 2975 Intake
Holley 800 CFM #4780-2
Open chamber (smog) heads 2.02/1.60
HEI dist, Accel Supercoil, MSD 6AL
Super T-10 trans.
Overall this sounds like a nice combo, I wouldn't rush in to make changes.
Thanks for the feedback. I couldn't find any info on the pistons either, but the po definitely says they're flat top. I really hadn't planned on swapping out the heads at this time at $1000-1500, so I'll probably just look at the cam and intake for now. And, if I was going to be doing much highway driving the 3.70s would have to go...but for around town they're ok.
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