>The exhaust header is quite easy. The GT-40P heads have the
>same exhaust ports as a standard GT-40 head, so any header
>that fits a 93-95 Lightning will work, or factory Lightning
>headers for that matter!


Thats not 100% true. The GT40p heads have a different spark plug location. While you can use a stard small block header you will have intferance problems to work out. Personaly I wouldn't waste my time with GT40p heads. Either go for the real GT40 head from SVO (whats on my 302) or a Windsor Jr. head. The last time I checked you could get the jrs for about $100 more than the GT40p heads. If your on a budget just port your E7s. A friend of mine ported a set at home and got numbers pretty close to the Windsor Jr heads just a little of at the higher lifts. Probably due to the valve size differance.