305 Monte motor HP upgrades

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39F

G-Body Guru
Sep 9, 2019
530
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Pittsburgh PA
Here's your 300hp mark
Screenshot_20210408-223913.png
 
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melloelky

Comic Book Super Hero
Oct 22, 2017
4,155
9,548
113
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I think the 200hp is a rough guideline,who's to say it's not gonna make that # with your foot to the floor on cool nite after the simple upgrades? in stock v8 form it's gotta close.if it was me and I already pulled the trigger on the set up,id throw the usual go fast goodies @ it and go.
 
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Jim Rockford

Master Mechanic
Nov 10, 2007
308
523
93
Shelby,N.C.
worst thing about a LG4 305 is the tiny *ss cam, if its a factory 4 brl engine then its more than likely got the big valve 305 heads that work great for a cruiser, they have fairly large intake ports also, but if it was mine I would swap cams and install at a min a 3.42 gear in the rear. a deeper gear will turn a slug into a fairly decent driver alone , if he are working with a steep gear like a 2.73 and swap gears you will also get a thank you letter in the mail from your transmission.
 

Jim Rockford

Master Mechanic
Nov 10, 2007
308
523
93
Shelby,N.C.
you gotta figure the 92 G92 5 speed 305s in the third gens were making a factory rated 230 hp and they still had a single exhaust back tot he muffler.
 
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Cuse99

Master Mechanic
Dec 21, 2020
251
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I saw a guy on youtube, I believe he is reputable, install TrickFlow heads designed for the 305 and they are supposed to be great.
 

Jim Rockford

Master Mechanic
Nov 10, 2007
308
523
93
Shelby,N.C.
I saw a guy on youtube, I believe he is reputable, install TrickFlow heads designed for the 305 and they are supposed to be great.
Think about it, How often do you trurly go over 5 grand 305 HO heads are just fine for street cars, first thing he needs to do is get a good gear. having 300hp in front of a set of 2.73s isnt exactly exciting.
 
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Jim Rockford

Master Mechanic
Nov 10, 2007
308
523
93
Shelby,N.C.
Sadly not sure on the LG4 or L69, is it stamped on it anywhere? I know the block casting number#14010202

Oh I totally agree, luckily I have "fast" cars. This Belair is just a cool cruiser for me, I don't care about it being fast.
14010202
14010203
30580-85Malibu, Camaro, Monte Carlo, Pass.,Truck

need the suffix code off the pad on the passenger front pad.
 

g0thiac

G-Body Guru
Sep 6, 2020
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