Hi ! I'm new here , i have a 67 comet voyager (wagon) with the 200 six . I aquired a 77 250 for next to no money.
My question is : should i swap the engine, or only the head ? Either way i would bring the head to a machine shop and have it milled for a 2v carb and general rebuilt.
My goal is to achieve a bit better drivability out of that car , whitout sacrificing too Much on economy , i want to Drive that thing often, nearly daily often.
I already have a Weber 32/36 on a adapter , dui style ignition and headers on the 200.
Thanks !
I don't have experience with the Weber but I don't think that the Weber carb will give you the fuel economy that the stock single-barrel carb does.
Just for information, my car is a convertible with a 3:1 rear axle ratio. It's the heaviest of the 3 Mustang models (actual measured weight long ago was about 3200 lbs with fuel). That's not too far away from what your wagon weighs. It's also a brick as far as aerodynamics go, again similar to what you have.
IMO, If you put the 250 in, start out with the single-barrel carb. The bone stock 250 has quite a bit of low-end torque - it feels close to that of a stock 289 V8 (my 250 is stock, except for the DuraSpark II ignition system).
My swap wasn't hard, but I started with a car that previously had a V8 and a T5 with a cable clutch in it. Yours will be a little more difficult because of the clutch linkage and bell housing. If you have long-tube headers, they won't work on the 250 without modifications to clear the starter and you'll need to figure out the engine mounts and change the bellhousing stuff. The rest is pretty simple.
I used a Ford Motorsports M6375D302B flywheel and the Valeo King Cobra clutch that I was using with the V8.
I don't know what kind of driving you're doing or what your differential ratio is, but if you're doing mostly in-town stuff and it's the stock 2.xx ratio, maybe changing the differential ratio to something in the low 3's will help with fuel economy, performance and driving satisfaction. You can do that for less money and less pain than doing the engine swap. And if your driving is mostly in-town, you'll probably see an increase in fuel economy too, assuming good economy-oriented driving habits.
Also, my opinion about the T5 - I wouldn't have swapped from the toploader that came with the car if I had it to do over again. I just don't use the overdrive that much.
Hopefully, the information/opinions we all provided are useful to you. But in the end, it's your car, your decision.
