A question for the HEAD DOCTOR

[1979bruiser]

i forget what the stock releifs look like but stock are similar and can only handle a 1.90 valve. does any one have a stock piston picture to compare?

[Dark Knight]

A couple things that I see..those KB's are a stock replacement piston, so sticking to a 1.90 intake would probably be best. The intake volume can be misleading, TW heads have the intake valve moved so runner cc will be different. With a performer intake I wouldnt go with to big of a cam, it will choke it at higher RPM. You might look at changing it to a stealth or performer rpm.

Rail type rockers are stud mount and were used to keep the rocker arms aliagned on the valve stem tip. They'll only work on valves that are designed for them with a longer stem. Pedestal mount is what they use in later 302's to keep the rocker straight, and yes, you can only use shims to adjust them. Regular stud mount rockers are what you want, the heads you get will have guide plates to keep things straight. Get a good roller tip rocker and you'll be fine.

You might go with less gear, or a T-5 conversion. 4.10's will suck of you do alot of freeway driving. Do they HAVE freeways up there?

Personally, I'd get eith AFR 165's or e'brock performers and the cam you have. I have the 165's and you can get them with a smaller combustion chamber so you wont lose to much compression.. but either one will make a bunch more HP than the stock heads. BTW is it an original 4v car?
I have a 68 coupe, but it's not really stock

[valley firearms]

Thanks for the input Dark Knight and bruiser. We don't have freeways up here, just a few highways (if that's what you want to call them). I am sure you are right about the pistons being stock replacements. I'm not sure if the car was originally a 4V. It does have the GT40P cast iron heads right now. It runs really good now but not good enough. I plan on swaping out the C4 for a top loader I purchased this last summer. I want to make a hydraulic clutch with the CNC slave and master cylinders. I was also contemplating using the hydraulic throw out bearing. I've heard pros and cons about those. Either way, I want a bad ass stang to cruise around in. I don't drive it much as I have been working on it for the last year. I bet I have less than 100 miles on it since I bought it year before last. Here is a link to my progress. I appreciate the input and really like this site.

http://www.putfile.com/valleyfirearms/images/16563

Thanks!
Mike.

[Dark Knight]

Those pics make me glad my 68 is an AZ car

[valley firearms]

word. But, when I'm done she'll be in great shape