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That's interesting to hear, looking at the numbers and the Holley cfm to cu.in. chart; I'd think that 870 would be too much carb for even a (mild) 408. How is throttle response on your 360 and how did you decide on the 870 over the 770?

Why 870 over 770?

Also, is the electric choke unit independent from the engine?

I have a 408ci running well with the Mighty Demon 650 but want electric choke. I don't like tuning carburetors, I'm at the point where I just want to drive it and not sit with my foot on the pedal for 10+ minutes to warm it up. I've heard negative about Street Avengers in the past. What are...

Anything above 10.5 CR is real iffy with street gas. Do you have an E85 station nearby? Are you going to replace the heads?

Why not 1.6 rockers?

If you want it done right... Read what happened to me after having a shop build my shortblock, the block I gave them is now useless and I ended up building it right myself.

That's something that surprised me. My square-motor 408 still revs very quickly. The diesel-truck amount of torque is great to have.

You'll also have to clearance the block.

A 27% power loss seems alittle high, I thought that the average loss from flywheel to rear-wheels is around 20%

How much did you 'score' these heads for?