If you need to speak with an Edelbrock technician by phone, please call 1-800-416-8628 from 7:00am to 5:00pm PST,

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Part of Tyrde-Browne Racing

Josh:
[quote]You'll probably end up with $400-$500 into a head with new valves, guides, hard exhaust valve seats, and all the machine work. My machine shop bill was $355, I supplied my own valves which were about $70 and I did my own port work. I reused the stock retainers and picked my best set of used springs. Don't forget gaskets![/quote]

Last year I performed this same performance upgrade to my car, for about the same dent in the old pocket book. Josh kindly walked me through calculating the new compression ratio, how much to shave the head, and Doc pointed me to information on porting & gasket matching all of which can be located on this site using its search engine.

I guttah say, that one upgrade sure woke up the old slant. No question on first drive if there was any improved performance after the head work, it was easily felt regardless of the poor distributor curve which I got set right after mentor Aggressive Ted guided my hand (see sticky under “Engineâ€￾ for “Timing Curveâ€￾, and a not so well tuned Holley 390 that still could be better after much fussing, but I can live with for now.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

so if im gonna take my head in to the machine shop what exactly should i ask him to do? and what parts do i need?

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Jon Hass 63 dart 225

You'll want a set of these valves. You'll have the machine shop install hard exhaust valve seat inserts, cut the head for the oversize valves and most likely replace the valve guides. If you cannot do it the shop needs to measure the combustion chamber volume so you can calculate your compression ratio and decide how much to mill the head to reach your target compression ratio. Once the head has been cut for the oversize valves you or the shop will need to blend the machined cuts into the ports. This can be time consuming and expensive for a shop to do which is why I do it myself.

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Joshua

If you need to install new guides you can go with a smaller valve stem like the Ferrea f6223 & f6224.

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it's like a vw, sounds like a million miles an hour but goes really slow. (for now)

sorry about stealing this thread jonbob, I was wondering if the preator was any good for our engines. Im looking at using on of these just because there different but if there not worth it well something else will work