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-   -   429 for a '72 Mach 1 (http://www.motorgen.com/forum/showthread.php?t=46142)

Vettezuki 02-03-2013 12:26 AM

My advice is conditional. If the Summit brand is functionally equivalent and your dad has no real concern of reselling, or of showing, but just wants to enjoy it with an affordable build-out, the Summit brand would be fine. If however, resale, and perhaps showing, are any kind of goals, stick to big name name brands; that's part of the benefit (right or wrong) that comes with brand premium in carrying value forward. Probably stating the obvious here.

Leedom 02-03-2013 12:38 AM

Yeah, my dad really does not care about brand names and the high air cleaner pretty much hides the carb anyway. Resale is not a concern because this car more than likely will be a family heirloom.

Vettezuki 02-03-2013 01:28 AM

Well, then it's pure price:function and "off brands" may be just peachy.

94cobra69ss396 02-03-2013 09:09 AM

The Summit carb was originally a Holley. I forget what model it was but it was something like a 4165 or something like that. Holley also makes a 4160 that's close in price if he preffers a Holley.

http://www.summitracing.com/parts/hl...10sa/overview/

Mach1Daddy 02-09-2013 10:52 PM

Had an additional Comp hydraulic flat tappet kit recommended to me. It is a Comp K-34-247-4 with the following specs:

Duration Int 274/ 286
Duration @ .050 lift Int 230/ 236
Valve lift Int .562/ .563
Rpm range 1800-6000

How does this compare to the first recommendation?

With regards to the carb question, I found some interesting info. As already mentioned, the Summit carbs were originally made by Holley. Fuzzy on who makes them now, but all Holley parts are interchangeable on the Summit carb.

Found some interesting articles in past issues of Mustang Monthly. They were really favorable in their comments about the Summit carbs. They felt that Summit combined the best of Holley and the 4100 Autolite series used during the muscle car era.

Will appreciate any feedback .

Shaolin Crane 02-09-2013 11:50 PM

That's a good cam so far, whats that lobe center?

94cobra69ss396 02-10-2013 10:19 AM

In my opinion you just can't beat a Holley. Parts are cheap, they're easy to rebuild when the time comes and they work great. As for those two cams, they are both Comp Extreme Energy cams and both are on a 110 LSA. Which one to run depends on what you want to use the car for.

The XE262H (smaller cam) will make peak horsepower at around 5000 and have a 5500 rpm shift point. Peak torque should be around 3500. It will have a better idle than the larger XE274H and make about 20 lb/ft more torque. If you just want a good street car and are keeping the 3.50 gear this is the cam I'd choose.

The XE274H will make about 20 hp more than the XE262H but it will be at a higher (5500) rpm. Peak torgue should be around 4000 and the shift point would be 6000. This cam will have a more aggresive idle if that's what you're after. If this is the cam you want to run I'd switch to a 3.73 gear and also go with a Performer RPM intake instead of the Performer.

Mach1Daddy 02-15-2013 04:30 AM

A bit of good news for the old wallet. The Mallory unilite distributor I have in my 351C is also used of the 429. Won't have to buy a new ignition set up.

94cobra69ss396 02-15-2013 06:47 AM

I wish I knew you already had the Mallory distributor because I knew you could use your current one. I just thought you had the stock points distributor in the 351C. What did you decide to do for a cam?

Mach1Daddy 02-15-2013 06:34 PM

My error. I was thinking about leaving the 351C intact for possible sale. But I think I'll keep it , at least for now. This does free up some bucks. Looking more and more at the Holley carbs. I know that the 4150 is about a hundred buck more than the 4160. What's your opinion? Do you think its worth it? Also the 4150 is 770cfm vs 750cfm for the 4160. I think I'll just stick with the first recommended ca. I figure I'll be over 400hp vs about 200+ that I have now. No point in getting carried away. Thanks for the input.


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