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Discussion Starter #1
$2281.24.. spent on (upgraded parts) .. and about 1400$ more to finish..
$250 On head work.. $475 on cleaning and polishing bottom end...
to total about to about 4400$...
It started a quick fix on a 60,000 mile all original el camino... and turned into this... Anyone have good money in a 305 and get any good power out of it? I dont regret the time and money since its my first build, and learning..but after checking out a JEGS mag i just got today I could have just bought a crate 383.. butttt all is done. no turning back now.. Im about 2 months out to finish.. since i only have weekends to work on her.

fill me in..
 

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Camshaft and exhaust,, the 305 are not rocket ships but run good witha cam upgrade,, the High po heads are a good investment too,, but I see you have yours done already,, Matty man
 

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on the other end of the spectrum

a co-worker rebuilt a 305 for his old chevy truck. it was one of the good ones, from an 85 Z/28. added an Rv cam (450/460 lift, 272/276 duration). A drunk ran into his truck when he had about 10K miles on that fresh motor.

so he sold me the motor for $150.00.

I win !!!

:nanawrench:
 

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Discussion Starter #4
I Have a 297 / 297 Thumpr Cam.. .479 intake_.465 Exhaust.. 650cfm carb-1inch lifter for better air flow(trial).. hedman headers. dual turbo mufflers out 2 1/2 pipes... i cant keep track, theres alot.. the only thing stock are pistons and crankshaft.. besides that everything is upgraded..

ill be happy with 225hps.. if more ill be a dancing banana :nanawrench:<-- thats me
 

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way too much cam for a 305. without a domed piston that is too big.get it down to the 260 /270 range in a 305
 

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Unless you're taking it to the track, building up a good running 305 is a perfectly viable option. I built up the 305 in my 87. It's a later LG4 with flat top pistons, slightly higher compression rate (9.3:1 i think), had 53k original miles and the bottom end was still solid. Kept the stock q-jet and distributor and added:

TFS 23 175 aluminum heads $900
xe262 cam/lifters $180
Proform 1.5 roller rockers $160
Performer EGR intake $195
GMPP Serpentine Kit $500
Edelbrock TES headers $390
single 3" exhaust w high flow cat $450
Borla XS Muffler $110
dual Spal electric fans $220
1987 Monte Carlo SS ECM $25
L69 HO Dual Snorkel Intake $175

That's about $3.3k not included incidentals. Also did non 305 specific things like: MSD box, beefed up 200-4R w Grand National internals, 1800–2000 stall converter, 3.73 posi rear, full Hotchkis TVS setup, slotted front discs, and 16" rims so it's a great street/all around car and just lots of fun to drive. Even kept all the emissions stuff and passes CA smog with no problems. It's the best of all worlds.

It's pretty close to a build recipe from a SuperChevy 305 build which added 153 hp to the 150 hp base LG4—from the butt dyno it definitely feels like 290–300 horses. Corvette racer and builder Dick Gulstrand drove it and couldn't believe it was a 305! If I had to it do it over, i'd probably have shelled out a little more and went with the hydraulic roller cam and added TPI (which I'm contemplating now).

I've got more info on my build thread which is in my sig. Good luck finishing your build and keep us updated. Would love to hear how it turns out!
 
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