351 swap

[GaryK]

Hey everyone, new to this so bear with me. Have a 96 GT, thinking of putting a 351 in. Have a friend with a 94 truck (roller cam in 94?) with over 150,000mi.
Would it be worth a couple hundred to buy motor or is it a waste to start out with high milage block ( and/or is this a very difficult swap). Thanks _ Red96

 

[Paul]

Do a search on this topic.

 

[19mustang95]

you have to switch out teh K-member in your car, and get one from a 94-95....at least you have to do that to put in a 5.0, and since they are similar, you probaably have to.

 

[Sn95Willis]

I have been wanting to do this... Wish i could find a running 351 for cheap!!! Good luck..



Willis

 

[Suspect]

theres actually a big read in the how to section about 351s. they can make some big power. but like DFG said, if u have to swap out k members.. it might not be worth it. maybe put all the $ into ur mod motor. :dunno:

 

[Suspect]

yea i thought i had one. was so excited. it was a friend of mine and he was gonna give it to me for 50 buxs. then i found out it wasnt a roller, i didnt wanna hassle with it. :-\

 

[waltnono]

If you need a 94-95 K-member then I have 1 for you. Just pull mine out over the weekend. Its something I could not ship but you can have it if you come pick it up.

 

[scarface]

Do a search on this topic.

You may be one of the first to ever say that on here Although I do agree....there are several threads on this topic open right now.

 

[Paul]

We should have a sticky about gears too so we don't have 35840384061 threads asking "What gears should I get?"

 

[scarface]

We should have a sticky about gears too so we don't have 35840384061 threads asking "What gears should I get?"

make a good write up on it paul and Ill get it sticky'd 8)

 

[Paul]

Here's a good one that pretty much sums it up:

THERE IS NO "BEST" GEAR. It's all personal preference and up to the owner and application. Here's my suggestions which will differ from the other 6840131807 opinions you'll get everytime someone posts a "what gears" thread.

94-95 GT/Cobra Stick = 3.73
94-95 GT/Cobra Auto = 4.10

96-98 GT Stick = 3.73 or 4.10
96-98 GT Auto = 4.10
96-98 Cobra = 4.10 or 4.30

Lower number = Better mileage, lower RPM
Higher number = Worse mileage, higher RPM

There, did I win?


I guess MAYBE I could write something a bit more elaborate, but really that's the jist of it.

 

[scarface]

Here's a good one that pretty much sums it up:

THERE IS NO "BEST" GEAR. It's all personal preference and up to the owner and application. Here's my suggestions which will differ from the other 6840131807 opinions you'll get everytime someone posts a "what gears" thread.

94-95 GT/Cobra Stick = 3.73
94-95 GT/Cobra Auto = 4.10

96-98 GT Stick = 3.73 or 4.10
96-98 GT Auto = 4.10
96-98 Cobra = 4.10 or 4.30

Lower number = Better mileage, lower RPM
Higher number = Worse mileage, higher RPM

There, did I win?


I guess MAYBE I could write something a bit more elaborate, but really that's the jist of it.

maybe something a little more elaborate...lol You know what you would want to see in a sticky about the gears...put it in a new thread and we can review it and make it a sticky.

 

[trav_19]

im doing a 351 based block (408) auctually but my car is a 302 car..94-95 soo it easier for me to do such a thing....i think it would be a lot of work to go from a mod motor car to a pushrod engine...maybe not but i really have no knowledge of the 4.6L cars.... i can tell you however that building a stroker 302 and a stroker 351 are not too different in price.. i would get a older block there stronger...

 

[Paul]

im doing a 351 based block (408) auctually but my car is a 302 car..94-95 soo it easier for me to do such a thing....i think it would be a lot of work to go from a mod motor car to a pushrod engine...maybe not but i really have no knowledge of the 4.6L cars.... i can tell you however that building a stroker 302 and a stroker 351 are not too different in price.. i would get a older block there stronger...

There is a difference in price tag between a 302 stroker and a 408 stroker - it mostly results from the cost of BIG everything. e.g. big heads, big intake, big (custom) cam, big TB, etc etc... If you don't go big, it's not really worth it to stroke a windsor. 302 parts on a 408 just make 302 power.

Paul.

 

[trav_19]

i dont see THAT big of a difference in price between parts for a 347 and a 408?? afr225 heads are 2k and a distrubitor and a oil pan a 351 intake... and the rotating assembly 60lb injectors... the prices are not that much more for what its worth

 

[Lightning Struck]

It just depends oh how much power you want out of your combo, any motor can be done on a " budget"

 

[Paul]

i dont see THAT big of a difference in price between parts for a 347 and a 408?? afr225 heads are 2k and a distrubitor and a oil pan a 351 intake... and the rotating assembly 60lb injectors... the prices are not that much more for what its worth

It's not a night-and-day difference, but it's there. Larger cubic inch motors tend to make more power than their smaller counterparts. This means EVERYTHING needs to be upgraded or you might just snap everything behind the flywheel.

Still, consider the following:

Small heads to big ones - maybe $800-1000 difference
Big exhaust - meaning 1 3/4" primaries minimum and dual 3" all the way out - this can get pricey
Big intake - TFS-R, or maybe Vic Jr EFI with an elbow
75mm TB vs 85-90mm
Big nasty transmission
Big nasty clutch
Big nasty strong rearend

...and so on.

It just depends oh how much power you want out of your combo, any motor can be done on a " budget"

Yes, but if you don't want tons of power - it just makes more sense to build a 302 or 302 stroker.



Having done it, I can tell you I have a LOT of money wrapped up in my big inch motor.

Paul.

 

[TRUUBLE]

Mine was pretty cheap . . . . ???

 

[Lightning Struck]

Mine was pretty cheap . . . . ???

yea, only took half a years salary huh ;D ;D ;D

 

[trav_19]

my good friend builds engines he went from a 351 to a big block so i am getting most of his old stuff for fair prices like trans and what not..he was carbed im going F.I. ...i did some checking into a 347 before i decided to take on the 408 build and there was a huge difference in my numbers so i went with the bigger cubes...if my power is lower then expeted i will upgrade some parts i dont think are satisfactory...but i think the 215hp they come with stock is a blast lol sooo im sure what ever my motor puts down will make me happy