i was considering rebuilding my engine and then adding a couple of performance parts, but the costs of doing that are really high from the quotes ive gotten. turns out, for the same price i can buy a gt-40 crate engine from summit (complete with all internals, just need to add induction and exhaust). heres my question, i know that stangs and trucks have different intake manifolds, so will a truck intake fit this engine? what about the exhaust, will truck headers fit? or will i need mustang headers? thanks for any help!!!
Correct me if I'm wrong, but I beleive that the 'GT-40" heads have stock location intake and exhuast ports which means that they can be used with all stoke induction and exhuast parts, truck OR car.
One other point you may want to consider when buying a crate motor is the cam. Depending on your rear axle ratio and tire size, the cam may not suit your specific application. Long duration cams give higher horsepower but at the price of putting the powerband in a higher RPM range. If the cam puts the powerband above your normal RPM range you'll be sadly dissapointed with your new engine, it will always feel as though it's gutless. For most truck applications I would keep the cam duration below 215 degrees @ 0.050". This will give you good low end torque and nice mid range power.
RCC
__________________
Life is a long lesson.
The more you learn, the more
you realise your not as wise
as you think. RCC
how about if i just add a carb to the crate engine, then add a cam with some nice low end power (ive been told to look for a cam with intake duration between 190 to 215 degrees). then in the future i could do home head work, or just buy a good set of aluminum heads. what do you guys think?
Keep in mind that you need to match the cam to both the desired RPM range as well as the Compression ratio of the engine. If the CR is less then 9:1 you can go with about 204 duration and under, if you are over 9:1 CR you need to go with and longer duration cam ( up to 215). This is because with higher CR engines, a short duration cam will cause cylinder pressures high enough to blow head gaskets or worse. Go to:
http://www.cranecams.com/master/apps/ford21.htm
for some idea as to what I mean.
As for heads, cast iron are better for the low end torque needed in an everyday truck motor although a good porting/polishing job won't hurt and that's something you could probably do yourself.
Aluminum heads are great for high end power but won't hold the heat needed for the good low end torque.
RCC
__________________
Life is a long lesson.
The more you learn, the more
you realise your not as wise
as you think. RCC
You really think a rebuild of your mill will go as much as a gt-40 crate motor? I have my rebuild pegged at about $1100. That gets me a donor long block, a rebuild, new cam, intake, carb and headers. I will be doing the most of the work myself of course, except for the machine work.
