79 v6 skylark engine swap/rebuild

i have a 79 skylark with a v 6 presently in it that is in the final stages of death with the rising prices of gasoline i have given up the v 8 swap plan for possibly a more cost effective one  how would a 4 cyl. chevy s 10 engine with twin tubos work in this car?
my v8 wish list for the car is a LT1 drivtrain from a 96 roadmaster whitch i know is a fairly efficient engine with power right out of the box   anyone got any advice??  

A Buick 350 with a docile cam and a well tuned q-jet with a TH200r4 trans will drop in with almost no modifications required (I can't think of even one, but there is bound to be something minor). They used the same accessory brackets, same motor mounts, the trans is the same length as the factory TH200, sensors are in the same place and the wiring harness is more than long enough to reach with the extra two cylinders. You will end up with more power than the v-6 and 25+mpg.  You'll need the aftermarket gizmo to get the torque converter lock up on the 200r4, and thats about it.

I've swapped in a 200r4 behind my old 231 and did not even have to shorten the drive shaft, modified absolutely nothing.  Now I have a Buick 455 under the hood (with a 5-speed manual, got ~23mpg until I pulled it and currently building an EFI 455 engine) and the wiring harness still reaches all the sensors and connections.  The 455 swap required new frame pads for the motor mounts, but the Buick 350 uses the same ones as the V-6.  
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The Silver Buick- '77 Skylark coupe w/ a Fuel Injected Buick 455&TKO-600, '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428&C6. Needing to replace a '69 Firebird 400.

http://www.bangshift.com/forum/index.php?topic=6189.0

The 4-cyl is the wrong way to go here. That car is heavy enough to need something that puts out decent torque if you want economy.

A mild small block with 9:1 compression and the right head/cam/intake combo, combined with an auto overdrive trans a economny gear out back will do everything you want. I'd say a mild 327 with a hydraulic roller cam would be about perfect.  

how would a rebuild of the v6 do with turbo   maybe similar to a regal grand sport  

You do have an even-fire engine, your best bet is if you want to go the turbo route is to get a standalone EFI computer with a fuel injection set up. I think the Turbo Regal/GN heads and intake will bolt to your block, or the intake may even bolt to your heads (not sure on that one at all).  A turbo on a carbed version of that engine would be a pain simply because finding a boosted referenced carb for such a small engine would be tough if not simply expensive (they are much more common for larger V-8's).  
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The Silver Buick- '77 Skylark coupe w/ a Fuel Injected Buick 455&TKO-600, '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428&C6. Needing to replace a '69 Firebird 400.

http://www.bangshift.com/forum/index.php?topic=6189.0

wow, It's may here in Georgia, time to hit the mountain roads. I know most of ya'll (buick hotrodders) are drag racers at heart but I love up&down right&left and being hung-out in a hairpin. so here's what I did. in 01-02 the rags(C.c.H.r)did an article Big Block Showdown and grassroots mag.$2002showdown. I put together a 76 skylark used a cad. seville(77)frame w/12inch rotors'5x5 bolt pattern disk brake rearend 3.42 posi IROC/TA quick steer gear box built a 200r4.found an almost complete 455 on craigslist. early heads(just built)an ol' Crane Fireball cam &an offey 360.crank rods pistons $400.00.pullapart supplied the rest.it has been a dayly driver ever since.less than 2000.00to start,easyly 50thousand miles of service.you left coasters don't really get all the fun,let's go chase some rice rockets.