351w in a 66 coupe

[Randys66gt]

1969 had the highest HP of 290. If you run the 84, it has a 28 oz balancer which means you can use your flywheel. Summit sells #88650 Hedman for $153.95. Didn't see it in MU. I haven't seen the higher mounts but I'm interested too. You can use the same starter and it depends on the header for the mini. I had the regular starter for a while and clearance was great with the shortys.

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[66 tang]

http://www.mustangsunlimited.com/key...ords=351w+swap here is the link for the mustang swap headers, if clearance is good with the stock starter and shorty headers than i just might go that route to save a little $$.

now how much clearance do you have between your shock towers and headers? and are you using stock 302/289 engine mounts?

and can i reuse the timing chain cover, water pump, crank pullys and harmonic balancer on a 1969 351w from my 302?

[Randys66gt]

Nothing against MU cuz I love that place and they like me for the money I've spent, but those are the Hedman headers I got from Summit. Save 30 bucks. I bought new stock mounts and they worked perfect. I also used the 289 (new) front cover, water pump, pulleys but got a SFI balancer. The clearance between our towers is about 3/4" on each side. Look at the picture, number 7 goes up and back and that is what makes the bolts dificult. The 67-68 have more clearance than we do because their car is wider.

[66 tang]

ok, i was thinking about beating the shock towers in a little to gain some clearance, and another thing i was thinking about doing was buying longer engine mount bolts and shimming the engine upwards with grade 8 washers to gain a little more clearance, same concept as the "raised engine mounts" and of course using a very small air cleaner.

what is an sfi balancer? and what are the advantages of using a sfi balancer?

and is there any differences in power between shorty and full length headers? or is that a dumb question

[Randys66gt]

If you have a metal yard around, get some steel tubing and cut it to spec. Use a thick wall tubing too. Good idea, I might try that. My balancer was shot, rubber coming out so the different between them, I went SFI. SFI balancers are guaranteed NOT to come apart at 6K and above. No real advantage except they do have both 3 and 4 bolts. The long tubes produce more horsepower. I used short because its going lower!

[Randys66gt]

You know, I have really been thinking about what you said about the mounts. If you go too high, that WILL change the angle of the trans WHICH in turn changes the u-joint angles! Not good if it's too much. Raising the engine 1/2" and the trans 1/2" should be ok. There really isn't room in the tunnel to go much more.

[66 tang]

well thanks for the advice randy, i really appreciated it, as of now im waiting for my new gas tank and heater junction box, and for my next pay check haha, i figure two more pay checks will cover my build up expenses for now.

oh, i was wandering, my donor 351w has a stock harmonic balancer off of an 1989 351w and it appears to be in good shape, is there any reason i couldnt reuse it on a 1969 351w?

[Randys66gt]

Look at the back of each balancers and MAKE SURE the balance weight is the same size. I don't remember what the 89 is. If they appear to be the same, no problems. The 50 in oz is almost double the size. Need anything else, let me know.

[66 tang]

ok, update, motor came in today, i had motor works in seattle build it, it is a 69 351w. they put a cam and springs in it and its supposed to be putting out 300 horse power, so im pretty excited about that.

im curious, can i reuse the flywheel that is on the 302 that was in the car?

[rmodel65]

if the the 302 is from 1981 or earlier