84L69TA

I got a complete 305 for free. My problem is I need to know what it came out of and what year it is. I know its a 305 because on the drivers side rear, by the bellhousing it says 5.0 LG. The casting numbers on the heads are 1402260. On the pad on the front of the block, the numbers are as follows: V1107FCH, and directly under that on the same pad are CEJ129532. I pulled the heads and it has pistons with NO valve reliefs. I want to build a mid 14-sec wee-05 for my 83 Trans Am, just to be a little different. Please help me identify this mini-mill. If it is no good, I'll look for another one. But I want to stay 305. Thanks in advance.

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1983 T-top Trans Am. All stock (for now) LG4/auto/3.73 posi. 70,000 original miles. SLOWLY going through a Knight Rider conversion. (it will be done one of these years)
Bset of 15.79@86mph 2.16 60ft

1963 Dodge Dart drag car. 360/904/4.88
Best of 10.94@120.44mph

84L69TA

nobody knows????

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1983 T-top Trans Am. All stock (for now) LG4/auto/3.73 posi. 70,000 original miles. SLOWLY going through a Knight Rider conversion. (it will be done one of these years)
Bset of 15.79@86mph 2.16 60ft

1963 Dodge Dart drag car. 360/904/4.88
Best of 10.94@120.44mph

RB83L69

The heads are probably 14022601... this is a 267/305 casting, so it's a pretty weenie one... the VIN segment on the block says that it came out of a 84 model car made in plant J, which I have no idea where it is or what kind of cars they build there, since I don't have the decoder for the first string of #s. There is of course no way to tell for sure whether those heads and that block came together from the factory as a motor, unless you can somehow research that VIN and find out what engine option it came with.

The 416 heads on your LG4 are probably a better casting than those. Still, without some good port work, either of them is going to be a major choke point to trying to get the power you're looking for.

If the pistons are dished, as it sounds like they are (virtually all flat-tops have valve reliefs, but dihes don't) it's going to be that much tougher to crack into the 14s at all.

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"So many Mustangs, so little time..."
ICON Motorsports

84L69TA

What size valves do the LG4 motors have? I found these heads on the motor I just got to be 1984 305 heads with 1.85 intake valves. I thought LG4's had 1.72's.Anyone else have any info on the suffix code on the front pad of the block (FCH)?

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1983 T-top Trans Am. All stock (for now) LG4/auto/3.73 posi. 70,000 original miles. SLOWLY going through a Knight Rider conversion. (it will be done one of these years)
Bset of 15.79@86mph 2.16 60ft

1963 Dodge Dart drag car. 360/904/4.88
Best of 10.94@120.44mph

RB83L69

LG4s have 1.84"/1.50" valves, like AFAIK all 305s besides the really weenie ones that have 1.72"/1.50" ones.

There's a whole lot more to heads than just the valve sizes. Castings differ greatly in their port sizes and shapes, the amount of metal in various parts of their casting (resistance to cracking), and lots of other things. If for some reason you don't like the size valves you have, it's even possible to stick bigger ones in them. Of course it usually doesn't make much sense to do that, since usually you can spend less money and get better results by getting better castings in the first place and spending your machine work dollars on good cast iron instead of crap (trying to make the proverbial silk purse out of a sow's ear), but it is possible.

What difference would it make to your buildup to find out what label was stuck on the outside of the sheet metal that was bolted around the engine for the first part of its life? You have it apart, you can look at all the pieces and see what they are. The motor is the sum of its parts, there's no magic left from its old chassis, there wouldn't be any left even if it had happened to have been a Vette.

So are the pistons flat-tops or dished? That, and similar things, would be a whole lot more to the point than worrying about what kind of car was wrapped around the motor.

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"So many Mustangs, so little time..."
ICON Motorsports

84L69TA

Well, i pulled a head. The pistons are dished. Im just thinking of maybe selling this motor and buying a 350. I mean I didnt pay anything for it so I could get away with throwing it out. But I think a 350 would be a much better bet.

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1983 T-top Trans Am. All stock (for now) LG4/auto/3.73 posi. 70,000 original miles. SLOWLY going through a Knight Rider conversion. (it will be done one of these years)
Bset of 15.79@86mph 2.16 60ft

1963 Dodge Dart drag car. 360/904/4.88
Best of 10.94@120.44mph