PLZ HELP, I NEED TO KNOW ABOUT THESE GT40 HEADS

[~-Ws50's916-~]

HELLO AND THNX FOR TAKING SOME TIME TO HELP

MY SET UP IS U PPER AND LOWER TRACK HEAT TFS WITH 1 INCH SPACER
70 MM TB
70 MMEGR
MAC HEADERS
UNDERDRIVE PULLIES
EXHAUST
CLUTCH
TRANNY
373 GEARS
NO MASS AIR

WHEN I PUT THE TFS ON, I ****ED UP SOMETHING IN THE HEAD, A GASKET OR SOMETHING I DUNNO, IT HAPPEND AT THE SAME TIME ( ID ONT KNOW HOW) LOTS OF POWER LOSS. THERS LIKE A PUMPING NOISE COMMING FROM THE HEAD.

THIS WEEKEND I WILL BE GETTING gt40 heads FROM AN EXPLORER SO I THINK ITS GT40 P. AND I WANNA PUT THOSE ON. AND TOMMORROW IM GETTING A MASS AIR KIT.

WILL I BE IN THE 13'S RANGE AT ALL?

WHAT ARE THE DIFFERENCES OF THESE HEADS AND MY STOCK HEADS?

WILL MY AIR FLOW BE ALRIGHT, BECAUSE I KNOW WITH MY SET UP, THATS TOO MUCH AIR FOR THE STOCK HEADS, WILL IT BE FINE WITH THE GT40 P HEADS?

THANKS ALOT YOU GUYS

 

[2000xp8]

P heads have a different spark plug angle. They also require different headers most of the time.