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If you are really worried about it take one of the springs off and measure the pressure at the closed height and the open height. And post the results or PM me. another good check would be to remove the lifters (one at a time so they go back in the same location) and verify that they are not...

The pistons listed with the 360 kit do not offer much compression in a standard rebuild with 70 cc heads and .050 head gasket. If you decide to go with a 360, I would get KB107's.

KB pistons have generous valve releifs so I dont think you would have problem with even some of the cams with well over .600 lift Piston to valve clearance is also effected by duration duration and lobe separation, not just the aggressiveness or lift of the cam. 1) the wider the lobe sep...

I like the performer RPM. A small single plane like the M1 may be a good choice as well with those gears.

In my opinion it would not be very difficult as long as the heads are ported.

A shop near me charges $50 to open up 1.88 heads to 2.02.

If you want power, port the heads. A cam to use use the new flow would make even more power.

I think that article may have printed the wrong retainer number. That sounds like the big block retainer part#.

I never tested an LD4B but I did test an LD340 on a mildly built 340 in a street/strip duster with a 2600 stall converter. What I found was a very small increase in peak power but a significant loss in low speed torque. Cold idle quality was terrible compared to the stock intake. My quarter mile...

Dont have many pics and shes in hibernation for a couple more months.

Thanks everyone, I forgot to mention, the duster has 90% of its factory original paint and has 8K original miles. It was purchased new about a half hour from where I live and the owner used it for about six months and then decided to do some mild racing and never really put it back on the road...

Thanks, I specify and sell custom cams ground by Engle Racing Cams (everything form circle track to general perfromance to factory appearing), so maybe I can help. In the next day or so I plan on posting some cam and pricing information in the parts for sale section.

US131 in Martin Michigan.

The Hughes rockers are made by probe. I tried a set of 1.6 about a year ago. The ratio measured in at 1.48. I sent them back. I was trying to increase the ratio from the Comps, identicle to the set purchased from scamp_408, which meaured slightly over 1.5.

Thanks, The car conforms to FAST rules which say the engine has to appear totally stock but internally any modification is allowed other than a power adder. It is a stroker SB with a 904 trans and 3:55 gears.

Hello, I have a factory appearing 71 340 Duster that I have been driving, racing and tuning for the last 10 years or so. Quickest time on Drag radials is 11.12 at 121 MPH, 11.66 at 118 MPH on repro polyglass tires. Thanks, Jeff Patterson