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390 bigblock vs 351w smallblock
#1
What will you guys suggest here? I got a 390 engine on my hand from a 68 mustang with 325hp for a good price.. My ideas with hp is to go with something like 400hp. I just think it's easier to reach that with this engine, instead of building a 351w with that power, or am I wrong?

What do you guys think?

Daniel

Daniel thumb

Pro-Touring 1973 Mustang named ''Creator'' ... Tongue
Under construction!!
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#2
The 390 was never a very good performance engine, compared to the later 428 and 429.
The 351w has had tremendous development over the years and there are far more choices in parts available. You could very easily get a smooth and reliable 400 horses out of a 351W for far less money and hassle than a 390.
Plus the car wil handle much better with a small block.
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#3
Okay thank you! Now I deffently want to go for the 351w.. I know there is more parts available for the 351w, and I think this will be better then, as you say. Thanks for helping me in the right direction :-)

Daniel thumb

Pro-Touring 1973 Mustang named ''Creator'' ... Tongue
Under construction!!
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#4
As much as I like FE's, it is far cheaper to build a windsor. You can build a 393 stroker for not much more than a stock rebuild.

1973 Mach 1 Q code 351 4V, 9A paint, standard interior, 3.50 rear, C6 trans.
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#5
That being said, a properly setup 390 FE does generate a tremendous amount of torque. Unfortunately, it's a bit on the heavy side.

The other advantage to the SBF is the number of parts and upgrades available for it. Things like the factory serpentine, fuel injection, much improved alternators, etc.

1971 Mustang fastback: 10.3:1 C90E 408W hydroller - CDAN4 EEC-V w/EDIS8, girdled, lowered and caged
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#6
400 hp (flywheel) with a Windsor is pretty easy. 351w with 9.5:1 compression, Edelbrock heads, RPM or Air Gap intake and a 224/230 (@ .050") cam. It's easy to drive and has a slight lope. If you're going with a complete rebuild, a 393 stroker is hard to beat. I went that route with AFR heads and the Air Gap intake for my '68.
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#7
What do you have or plan for a driveline? FE engines have a different bell housing pattern. Whichever way you go, consider not only engine build costs but accessory and bracket costs as well, as some of those can really add up

Windsor will be cheaper to build. Absent a set of specialty heads, it will generally outperform the 390-get some high flowing heads for the 390 and everything changes.

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
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#8
Sell the 390 to an enthusiast for his restoration.
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#9
Jeff73Mach1;165649 Wrote:What do you have or plan for a driveline? FE engines have a different bell housing pattern. Whichever way you go, consider not only engine build costs but accessory and bracket costs as well, as some of those can really add up

Windsor will be cheaper to build. Absent a set of specialty heads, it will generally outperform the 390-get some high flowing heads for the 390 and everything changes.

That's a good point. Big block bellhousing limits a lot of transmission options.

1971 Mustang fastback: 10.3:1 C90E 408W hydroller - CDAN4 EEC-V w/EDIS8, girdled, lowered and caged
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#10
cazsper;165640 Wrote:400 hp (flywheel) with a Windsor is pretty easy. 351w with 9.5:1 compression, Edelbrock heads, RPM or Air Gap intake and a 224/230 (@ .050") cam. It's easy to drive and has a slight lope. If you're going with a complete rebuild, a 393 stroker is hard to beat. I went that route with AFR heads and the Air Gap intake for my '68.

Sounds exiting, how many horsepower did you end up with that setup? :-)

Well, as I understand it, everything will be a lot more hard to build with the 390..

My plan is to make a T5 or TKO swap when I got the money for it, so I think the best will be to searh for a 351w block, and build it with some good stuff! :-)

Daniel thumb

Pro-Touring 1973 Mustang named ''Creator'' ... Tongue
Under construction!!
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