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why don't you run a 26 or 27" tall tire and keep the 3.91s. the if you drive it on the street with a 27 or 28" tire it will be a lot more livable, and it will work better with your 1st gear launch.

Does anyone know if there is an aluminum 4 bolt master cylinder for front disc brake, rear drum cars? A-body. A part number would be most helpfull - if there is.

After no more than 200 miles mine quit completely. took it apart - bottom sealed bearing had seized - replaced it for $12 and has ran at least 500 miles and 50 trips down the track. Their all noisey it seems.

4.56 with a 28" tire is a very good combination. A 318 will handle a 26" tire. 5.57 with a 30" tire is good to 120 mph. I guess if your not going any place fast it is - lot more can be had with a lot less gearing.

12-14* initial, 34* total all in by 2500-2800rpm. change to 3.91s before it blows up - unless you have ±34" dia. tires.

What are the downsides of having too much seat pressure with a hydraulic cam? Is 160#s too high for seat pressure running a hydraulic cam? thanks

you could always buy MOPAR and then rest assured you are getting top quality products for the $$$ spent.

Intimidator thanks - just what I was looking for.

Can one be purchased aftermarket to fit a small block mopar crank - if it makes a difference? not a stick shift guy thanks

The aluminum holddowns are the way to go with the crane rockers. Another thing to check is the number of adjuster threads showing when the pushrod has the correct preload. Each should have 1 1/2 - 2 1/2 threads showing. custom length pushrods may be in order.

clarification to the above - 16 roller bolt in sprag, reverse manual valve body with low band apply, aluminum deep pan,

4secondsflat.com sells a 1/2" aluminum spacer that would allow you to keep the 273 VCs - something different is good.

yes, you are over carbed - I doubt you will have enough vacuum to open the secondaries. A 750 would work way better. 34-36* should be good - all in by 2500rpm. Too much gear too IMHO. Try 77 /85s to keep 8 size difference to compensate for the power valve in the primary side.

very nice setup - you will need more tire than 26x8. the 255 x 60s ET street radial are 27" x 8 3/4" tread and will fit in the fenderwells on a 8"cop rim or similiar. I'd like to know what you have invested in the heads and intake - thinking of making a change.

go with a good mechanical pump. if not the new style 125 holley electric pump.

Len Is that a BIGS stage 7 950?

deman360 I have the same setup as you have - its called the 'sewing machine" affect and yes it has to do with the aggressive cam and higher lift - all in the persuit of more power - there always is a downside.

maybe high 11s - needs more compression

Exactly - otherwise you will never know what good the the money you dumped into it over the winter did for you. Pesimist - 13.5

Now thats hauling the mail

Congrats sounding real good. I figured somewhere in the high 10s - guess it has a bit more. Curious about you comment on only running MT radials as they have a rep of being as good as or better than slicks. :confused: Anyway - enjoy.

Its good to see the 2 of you enjoying the fruits of your labour. When you going to give us a rundown on the powerplant? we know it has W5s. Are you taking it to the Bend this weekend?

13.00 but you will likely need some slicks to get it. I hope you have added welded in frame connectors - big difference with traction and body twist.

Add only a sure-grip and leave the rest alone (well maybe one other change - up the timing to 34* total mechanical). If you keep doing burnouts with a peg leg you will soon need one anyway - and maybe more!!

11.66 with P&P 202/160 - 596s on 10.4CR 388ci SB 3350lb Dart trapping at 6600rpm w/ RB cam 254*@.050 554/520 vl.

MSD says the higher the compression - the lower the gap. 10:1 -11:1 should be ±.045 - .050.

[It had very little or no tirespin launching at 2,500. Hooked real well with the new shocks. Did you try launching just above idle - like 1200rpm? sometimes loading the convertor up is not the best launch for 60' time etc. Take you 600cfm with you next time and swap out to compare- you may...

3.91s with a 4 speed will work great - and give you some drivability on the street. I've been running 4.30s and am switching to 3.91s for the very same reason - streetability.

Should be in the 5K range. What is the calculated CR? Does it require higher than 91 octane to run at GB?