351 Cleveland build advice needed

[3514boltstang]

Hey Guys

I have a 1971 2v Cleveland with low mileage and I have a nice set of 1970 4 v closed chambered heads with screw in studs and roller 1.7 rockers and a performer 4v lb intakeMy question is:what's the best cam to use to make a nice street motor that pulls down low?thanks

 

[Mister 4x4]

What's the gear ratio in the rear axle? If you have anything "shorter" than 3.50s, you're giving away all your low-end grunt to cruising gears.

Swapping in a set of "taller" gears will get you the off-the-line power you're looking for without the expense and work of swapping cams.

Hope that helps.

 

[3514boltstang]

Well,I haven't decided what gears yet, I want to build the motor and fit the gears to it if that makes sense.Im assuming the stock 2 v cam won't be any good with closed chambered heads?

 

[helldive]

Mutha’ Thumpr™ - High performance street/

strip, needs 9:1 compression, 2500+ stall,

intake, gears and headers, rough idle.

Hyd. Hyd. 2200 to 5900

http://www.compcams.com/Thumpr/doc/THUMPRlow.pdf

This kit gave me 537hp at 6100rpm and 512lb max torque at 4800 rpm she made 453lb at 3200 rpm

 

[jbojo]

Well,I haven't decided what gears yet, I want to build the motor and fit the gears to it if that makes sense.Im assuming the stock 2 v cam won't be any good with closed chambered heads?

What's the rear end ratio, 4 speed or automatic, the stall speed if automatic and the intended use?

As Eric mentioned if you have a 2.70 or 3.00 rear if you build up the motor it's still going to be a dog at launch. You will see a world of difference just by switching to a 3.50 rear and your current 2V motor. If you get a cam that comes into power at 2500 to 6000 RPM with a 2.70 rear you are not going to be in the cam power band at low speeds.

You need to consider the whole package as a whole before you start. Think about how you intend to drive it, you don't want to be fighting to keep it idling in stop and go traffic etc. With the more performance cams you will have to get a higher stall converter too if running an auto.