4.6 vs 5.0 Cobra

[98gt5sp]

I have a 98 GT, and I am thinking of selling it and getting either a 94-95 Cobra or a 96-98. The main reason I am getting rid of my car for a cobra is that the heads and intake manifold are so crappy on the 98 GTs, and they cost a FORTUNE to replace. Replacing the intake manifold is necessary if I want to go the blower route, and I can't do a supercharger and heads together w/out a new short block because of compression issues. It might be nice to go with the 5.0L cobra, since the engine is much simpler, easier to work on, and since the car is much cheaper to mod. However, the 96-98 cobra has 65 more horsepower stock than the 5.0L (305 instead of 240), and the cylinder heads are much stronger than mine even though its 4.6L. Is the 65 extra horsepower and 13.99 stock 1/4 mile times (as opposed to 14.5 1/4 times for 94-95) worth the increased cost to mod the car and the increased difficulty in engine work? I know this is getting back to the huge question of which is better, 4.6L or 5.0L, but any advice/input would be greatly appreciated. Thanks,

-98gt5sp