gt40 heads

I have an '89 LX Convertible 5.0. Some people refer to it as an anniversary edition, however it's not...they just say that because of the "25 years" badge on the dash. It is however a very an uncommon set up (ordered from factory)... It's black with white rag top and white leather interior...

I've been considering doing some power upgrades to the 302 and I'm debating weather to go with a new cam or go with 1.7 rockers... Its a carbureted '85 HO running flat tappet currently. Nothing is done besides emissions removal. I WILL put either a pair of GT40 or GT40p heads on before this. New...

Im sure this has already been answered, but it's hard to find a straightforward answer on the interwebs. I wanted GT40 heads, but junkyard had the P's for 70 bucks so here I am. I know about the sparkplug situation, and atleast I know I need 90* boots. Speaking of which can someone send a link...

Hey, new to the forums. Been looking around and haven’t found much info on this combination but I was curious if it would be a smart idea to put the stage 1 cam in with custom gt40 heads. The guy I’m purchasing them from says the heads have a max valve lift of .475 and I believe the stage 1 is...

Ok, I bought me a 86 mustang with a 306 carb engine. Holley 4 bbl, edelbrock performer air gap intake, gt40 heads with comp cam alumi saver roller rockers 1.6, edelbrock long tube 4 to 1 headers into single chamber flows. That being said I purchased the car with an overheating problem. The...