Dtret Posted February 11 Posted February 11 3 minutes ago, Korey said: Thank you for the information. The car does not have a motor in it and no clue what was in it originally. I would love to find out what it was supposed to have so I can get it as close to original as I can. If not my buddy has a 454 that I can buy to put in it but would like to figure out what is supposed to be in it. I really do appreciate everyone’s help and information. Pretty awesome group of guys Is the transmission and rear end still in and original? 2 Quote
Dtret Posted February 11 Posted February 11 Not always the case but in most circumstances a 10 bolt rear end and a turbo 350 would dictate a small block. A 12 bolt rear end and a turbo 400 would indicate a big block. But remember any of the combinations could be special ordered. Remember also the only way to get a 454 was with the SS package and there would hopefully be tell tale signs of that. 3 Quote
jft69z Posted February 11 Posted February 11 Look at the end of the steering shaft, at the steering box. Is it one piece, or does ot have a clamped on flange? One solid shaft - small block Clamped on flange - big block Left one is big block 4 Quote
willie Posted February 12 Posted February 12 You can take pics of the engine bay and gauges and show us and we can get pretty close to what it should have!!! These guys are good!!!! 3 Quote
Rob Peters Posted February 12 Posted February 12 4 hours ago, Scott S. said: October of '69 ?? Yes, since it is a 70 and the code is 10A, that would be the first week in October of 1969 since by October of 70 they would be turning out 71's. rob 2 Quote
Scott S. Posted February 12 Posted February 12 A V.I.N. search might also give you the information you're looking for. Welcome to the site. Scott. 1 Quote
Korey Posted February 13 Posted February 13 On 2/11/2025 at 4:47 PM, Dtret said: Is the transmission and rear end still in and original? They are both in it but not sure if original. I’m assuming and hoping the rear end is. Would be nice if the transmission is too Quote
Korey Posted February 13 Posted February 13 On 2/11/2025 at 5:11 PM, jft69z said: Look at the end of the steering shaft, at the steering box. Is it one piece, or does ot have a clamped on flange? One solid shaft - small block Clamped on flange - big block Left one is big block Mine looks like the one on the right in the picture Quote
jft69z Posted February 13 Posted February 13 1 hour ago, Korey said: Mine looks like the one on the right in the picture Then it's a small block car, most likely a 350. Doesn't mean you still can't put that 454 in it though. 1 Quote
Korey Posted February 14 Posted February 14 24 minutes ago, jft69z said: Then it's a small block car, most likely a 350. Doesn't mean you still can't put that 454 in it though. I’m really starting to lean towards the big block. Painting it the original color with some craters. I think it would be a sweet looking car 2 Quote
willie Posted February 14 Posted February 14 Korey She is yours you do what you want. I agree that you try and keep her as original as you can but if she doesn't have an original engine, trans, or rear. What's the sense, do what you want! I also like to keep mine as original as i can but the last one i will do will not be all original. 2 Quote
Marks71 Posted February 14 Posted February 14 Count the number of bolts holding the cover on the back of the rear end. Will be either 10 or 12. Here is the pan for a TH400 transmission. If the pan is square with a clipped corner then you have a TH350 transmission. 2 Quote
Korey Posted February 14 Posted February 14 13 minutes ago, Marks71 said: Count the number of bolts holding the cover on the back of the rear end. Will be either 10 or 12. Here is the pan for a TH400 transmission. If the pan is square with a clipped corner then you have a TH350 transmission. Ok. What’s the difference between the two Quote
Korey Posted February 14 Posted February 14 2 minutes ago, Korey said: Ok. What’s the difference between the two The rear end and transmission Quote
Dtret Posted February 14 Posted February 14 6 minutes ago, Korey said: The rear end and transmission The difference between the two transmissions? Quote
Rob Peters Posted February 14 Posted February 14 15 minutes ago, Korey said: Ok. What’s the difference between the two For the transmissions, Regarding the transmissions, they are completely different transmissions. The Turbo 400 is larger, longer, and heavier than the Turbo 350 and was designed to live behind higher-torque applications such as big-blocks. That doesn't mean the Turbo 350 is weak in comparison. The TH400 is the stronger transmission. It's built heavier and larger than the TH350, with heavy-duty applications in mind. Even later versions of the TH400 continued to focus on handling high-torque, high-horsepower input; essentially, the TH400 is a more robust transmission for heavy towing or high-power engines, while the TH350 is a lighter, more efficient option for everyday driving. rob 2 Quote
Marks71 Posted February 14 Posted February 14 The 12 bolt,( like the th400 trans is to the th350 trans), is a heavier stronger piece than the 10 bolt. GM made a variety of 10 bolts over the years. Some not so good, the ones in our Montes are not those. There is nothing wrong with a stock 10 bolt under normal driving conditions. They can be rebuilt to be considerably stronger though. If you’re lucky enough to have a 12 bolt, then good for you. Especially if that 454 you’re thinking about using gets dropped in and you’re planning on tearing up the streets. 3 Quote
Scott S. Posted February 14 Posted February 14 19 hours ago, Rob Peters said: For the transmissions, Regarding the transmissions, they are completely different transmissions. The Turbo 400 is larger, longer, and heavier than the Turbo 350 and was designed to live behind higher-torque applications such as big-blocks. That doesn't mean the Turbo 350 is weak in comparison. The TH400 is the stronger transmission. It's built heavier and larger than the TH350, with heavy-duty applications in mind. Even later versions of the TH400 continued to focus on handling high-torque, high-horsepower input; essentially, the TH400 is a more robust transmission for heavy towing or high-power engines, while the TH350 is a lighter, more efficient option for everyday driving. rob The 1st and 2nd gear ratios are also different... Just thought I'd mention that. Quote
Korey Posted February 15 Posted February 15 She’s a diamond in the rough but alot of potential. Really good shape considering it’s been sitting in the dirt for twenty plus years. I still can’t believe I found it and got such a good deal on it 4 Quote
Marks71 Posted February 15 Posted February 15 I see it started life as a column shift car and the console and possibly the buckets were added later. Quote
jft69z Posted February 15 Posted February 15 1 hour ago, Marks71 said: I see it started life as a column shift car and the console and possibly the buckets were added later. The trim tag code said 757 though, which would be black vinyl buckets. Maybe the console added later? Quote
Marks71 Posted February 15 Posted February 15 Yes, didn’t see the trim code, that’s why I said possibly the buckets because I wasn’t sure. But I would think the console for sure. Quote
jft69z Posted February 15 Posted February 15 1 hour ago, Marks71 said: Yes, didn’t see the trim code, that’s why I said possibly the buckets because I wasn’t sure. But I would think the console for sure. Yeah, I don't know if you could get buckets without a console. Anyone know? Heritage Center documents show it as a line item, RPO D55 Quote
Dtret Posted February 15 Posted February 15 My pos 70 was buckets and no console when I got it. But it was a Flint car so no real proof. It did have the gear selection on the speedometer like his does and no console mounting brackets on the floor. But it does have the correct bucket seat brackets on the floor. Proof enough for me. Quote
jft69z Posted February 15 Posted February 15 4 minutes ago, Dtret said: My pos 70 was buckets and no console when I got it. But it was a Flint car so no real proof. It did have the gear selection on the speedometer like his does and no console mounting brackets on the floor. But it does have the correct bucket seat brackets on the floor. Proof enough for me. Trim tag should say what the seats are too. Quote
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