The truck is a 1988 fuel injected 460 4x4 twin i-beam 5 speed stick. I wouldlike to put a fuel injected 302 in.

I used to drive a half ton F.I. 302 and what a power house. I am trying for a little better fuel millage.

Would the tranny bolt up if I got the correct bell housing?

Do you weld engine mounts or do they unbolt out of the trucks?

Do I use the same wiring harness and just swap computers?

Any help and insight would be appreciated.



Brett

 

The 302 will not bolt up to the ZF5 off a 460 and it has an integral bell housing! So No!

The mount towers are riveted, unless already changed to bolts.

Wiring harness ... Don't know.

351W would be a better choice from what most around here say.

-Enjoy
fh : )_~

 

You're kidding right.. just forgot to insert the little smiley face, you know it's gonna be pretty doggy compared to the 460 and was trying a little humor.

Anyway.. If it's just a driving around truck then it will certainly do better on gas, but it won't haul very well without lots of gearing. If the truck has 4.10's already it will do reasonably well. The wiring harness won't be an exact fit but it should be close enough to work, and you definitely need a 302 computer.

 

Yes I agree that the 460 will haul better. But I would go across the scales at 10-12 thousand pounds with trailer of course and that little 302 f-150 would pull op the hills with no problem and that was with 3.55 gears and a AUTOMATIC.

I would think in a three quarter ton it yes would perform yes a little slower. This is for personal use and I aslo don't mind going 55 mph for 6 minutes up the a hill.

If I did leave the 460 and drove easy what would the fuel millage be with a 5 speed stick and probably 4.10 gears?

You said not an exact fit on the wiring so I will have some wire splicing or ?
thanks for the scoop.

brett

 

Did the 351w come in a fuel injected form in the truck or coud it be easily transplanted easily?

 

yes the 5.8 was efi for that year and would be a good transplant but would still require a different tranny as the 460 zf will not work period.

is the 460 stock? how many miles are on it? what tires does the truck have and what is the gearing in the axles.

 

Listen... it must have been a while since you drove a 302 truck, the 460 has clouded you memories of life with a 302. All the early 5.0 trucks had problems maintaining hwy speeds up grades with nothing in the bed and nothing attached, that's just how it was. I have towed plenty with a 5.0 F150 with 3.55 gears and an automatic and it slows down uphill with a couple sleds dragin behind, nevermind a flatbed with 2 cars on it.

Single digits around town and low teens highway.

Possibly, but not much if any.

 

Thanks for the added info. The truck has 100,000 miles on it with stock tires and the gearing will be either 3.73 or 4.10

The 1990 fuelie was driven a year ago and it would sail down and up the freeway with no problem in overdrive so maybe you have steeper hills in Canada than so Cal.

In fact this 302 seems to have as much power as my 93 dodge truck with a port injected 360.The Dodge is in better shape all around.

My 93 dodge 4x4 with 360 and 5speed makes around 13-14 miles per gallon if 460 would be close I might just leave it.

 

Wow.. that's not normal at all, are you sure it's not a 5.8? or a 5.0HO under a truck intake?

Yeah the 460 should be close, maybe leave it as is and use it for the heavy hauling and get something else to do all the other driving around.

 

This is definitely a 302 now maybe someone chipped it long time ago.

I plan on getting my friends 82 Chevy blazer with a 6.2 engine he bought new in 93 he gets around 21 mpg I would use this for driving and truck just for hauling.

Boy when it comes to compatibility of engine and trans Chevy is much more friendlier. Oh well

 

the hills in socal except for the grapevine are nothing to write home about so really not impressed with the size and are more like bumps then hills haha.

if you install headers, a new mandrel bent Y pipe and 3" exhaust with hi flow cat behind that 460 you should see noticable gains in both power and mileage. also running regular copper plugs, 9mm ford wires and adjust the timing to 12*btdc with spout disconnected should also help. you didnt say what size tires you have on that truck with the 460 so depending on the gears you have tire size could impact the mileage. when was the last time you changed the fuel filter also on that truck.

 

I don't know about that, when was the last time GM used a manual tranny with a detatchable belhousing? That's the real issue here, if the truck had a T18 then it would almost be a direct bolt-in.

 

or an np435 which you can setup for hydrolic clutch also.

 

To answer your question to Chevy's last transmission with bell housing the year is 04/05 using the new venture 4500.

Both dodge and chevy used the same trans so they made it with a bolt on bell housing and one can adopt it very easy and cost effective to 50's on up Chevy motors.

The 460 I have is the manual 5 speed and it is running stock tires