[kellar86]

I am looking for an adapter to go from a 351 truck lower intake to a 302 HO upper. Does anybody know if there is one available?

Also, has anybody ran a B-303 cam with a speed density set up?

[GTS 5.7]

Watching your post...thinking of swapping truck 351 into '93 2.3 car using '95 GT upper...I didn't know they wouldn't just bolt right together.
Hope you get the answer you're looking for--I guess I need to know too--surely you've checked(I haven't-not ready yet) that they DON'T work??

[5SpeedGT]

No, there is not an adapter for that set-up. The ports on the truck lower are completely different from the Mustang/car lower. Holley does make a mustang upper that uses the truck lower though.

As far as the B cam with SD, u more than likely will need a tune, or to convert to mass air. it's been done, but a surging idle and rich mix are usually the results.

[kellar86]

I believe the Holley upper only fits the 302 truck. The 351 uses oval ports. Are there adapters available to use a 302 intake on a 351 block?

[5SpeedGT]

I don't think so, considering there's a nice selection of 351W intakes available. Keep in mind, anything designed for a 289-302 is going to be a restriction on the larger W.

[white89]

You can also use edelbrock 351w truck lower #3884 and car upper #3822 (Performer) or #7123 (Performer RPM II).

Don't use the 351w truck upper, they aren't a performance intake and you will have major hood clearance issues.http://http://www.edelbrock.com/auto...l-inject.shtml

[84 predator mus]

302 manifold to 351 head adapter kit: http://www.pricemotorsport.com/html/...e_adapter.html


351 truck lower intake to 302 upper manifold adapter: http://bcbroncos.com/store/product_i...oducts_id=1059

both can be done