straight 6 cylinder in an A-body

I've developed a recent interest in straight 6 cylinder engines.  One engine I'm considering is the 300 ci (4.9 litter) ford.  There are a lot of them and they are reliable.  Also with lots of displacement, they make decent power.  However, I'm wondering if it will fit in a typical GM A-body (64-72 chevelle, skylark, lemans, cutlass, etc).  Will it be too long or too high?  Another possibility is the Chevy 292 - same questions for that engine - I think the length will be ok bu I think it is a taller engine.  

The chevy 292 will fit in the Chevelle no problem, it is the same length etc. as a 230 or 250 inline.  Most parts from a 230 or 250 cid chevy interchange with the 292..  intake, exhaust, valve covers, cam, all the same...  The block itself is about 2 inches taller to accomodate the 292's large 4.25" stroke.  (because of this the 292 has taller side lifter gallery covers)  The 292 is a great motor and thanks to that monster stroke crank it makes gobs of low-end torque.  I believe the passenger side motor mount location is different on the 292 than the 230 or 250, so you may have to do a little fabrication to make it work.  If I remember correctly, the driver's side mount is the same as all the other chevy sixes.  I like chevrolet inline sixes because they are cheap, reliable and so simple.  

The 292 cam is different than the 230-250.  The fuel pump is in a different location due to the right engine mount location.  Isky has cams for both engines.
Don  

Will the taller 292 require any hood modifications?  Also does anyone have a sense for what kind of torque I could get from a mildly worked 292 (assume 9:1 compression, 220 degrees duration @ 050" lift, 650 mechanical secondary 4 barrel carb)?  

if budget allows consider a 250 chevy  you can press in steel sleeves and punch it to take 350 pistons.  then put them in backwards(this only works on pistons with offset pin)...  there is a wealth of after market support for the 250 straight.   and the old timers will tell you that very few cars had the gumption to tangle with the straight six equipped rs camaros stop light to stoplight.  

Hey dude maybe consider the Pontiac OHC Sprint 6. It CAME in Tempests that body thru '69. They are stupid rare now, but not impossible to find. You would be the man when you popped the hood! My first car was a 66 Tempest Sprint, converted to a five-speed. I made a few big-block owners frown with that thing. Came with a Q-Jet and a chrome louvered air cleaner, split manifolds, and made over 200 HP. The finned aluminum cambox and timing belt cover are sweet looking! Check one out, maybe since the factory installed them, the rarity trade-off would be worth it for ease of installation.

Only experiences I've had with the Stovebolts says yuck. They spew oil and exhaust from every orifice, IMO.

For what its worth, a GM 4.3L V6 with a carb should be an easy fit, too.  
1969 Grand Prix  
1972 Cutlass Supreme
1976 El Camino

At the risk of showing my ignorance, what is the advantage of using sleeves with 350 pistons?  Aside from that, I like the idea of using a 250.  The installation should be easy but I did not expect to get much power and torque out of small displacement without hurting drivability.  That's what I like with the 292 - The cubes are the easy way out.  

I'm aware of the sprint 6.  That would be sweet.  The dilemma is to choose between something sexy like the sprint 6 and something easy to find parts and advice for like the modern chevy straight six.  Since my expertise is limited as is my patience, the desire to get behind the wheel quickly makes me lean away from the sprint 6.  

basicly you end up with an over bored engine, beyond what the stocker can take and it increases block stiffness,  plus the advantage of a cheap compression boost useing the offset pin pistons, that are readily available, cheap and or free.  i went this route in a pickup with a three on the tree and 342 gears with a header and twin two intake,  alot of guys got a serious surprise when I mashed the loud pedal.   although i have to agree with the sprint 6 suggestion as well  a bud had a 65 tempest with that motor and it was respectable and just plain cool  

Seeing that your into Straight 6 engines, I havve one sitting in my garage. It's been sitting for many many years. It's was bought for a 74 Triumph TR-6 that was crashed before it was dropped in. I was wondering how much I could sell it for.  

What engine is it?  Tell me about it.