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12-21-2002, 01:06 PM
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Small Block Chevy into An Olds
<img src="graemlins/pimp.gif" border="0" alt="[pimp]" /> I bought a 1987 Olds Supreme in 1987 new and love the style and want to keep.I want to swap my tired 307 Olds for a fresh 350 Chevy. How tuff is this? Will the parts from a V-8 Monte Carlo of the same year be of any help? Any help would be great. [quote] <hr></blockquote>350 Chevy into a 1987 Olds Suprene
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12-21-2002, 01:34 PM
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That will be a very direct swap. As long as you retian the 1 piece rear mian seal.
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12-21-2002, 01:54 PM
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Slam Dunk of a swap, I have a 86 Cutlass that I did the same thing to. you`ll need chevy motor mounts, chevy tranny. real simple, your current starter is on the drivers side, the small block chevy is on the passengers side, but the harness will reach. your crossmember will also bolt right back into place if you use a TH350 tranny. one thing i can say is get you some gears. the rear ends in the cutlass line is 2.14, 2.29 and 2.56. I took a 83 firebird T/A 3.23 geared rear and just swapped guts, gears are your biggest bang for your buck. if you need more info on the rear swap, let me know, I can tell you the codes from 82-87 Z28`s and T/A`s rears that have what your looking for.
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12-21-2002, 02:27 PM
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[ December 22, 2002: Message edited by: Vinstar350 ]</p>
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12-21-2002, 03:34 PM
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Hey Doublevision. Do I need a short tail or long tail TH350? How About A TH400? Will the driveshaft need any modification??
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12-21-2002, 08:10 PM
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You`ll need a short tail Turbo 350, the stock drive shaft will bolt right into place. I do not know if a TH400 is the same lenth as a 350, but if I wasn`t going to make lots of torque then a 400 isn`t needed, it`s just added weight.
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12-21-2002, 08:28 PM
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also a th400 is geared a little higher in first and second gear.
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12-21-2002, 10:22 PM
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Probably the biggest issues you will run into are the front accessory drives. For instance (and it's been a few years) I believe the A/C compressors are on opposite side of the engine on the Olds vs. Chevy. Same goes for the alternator (no big deal there). As stated before, the starters are on different sides. You may also have to play around with the fuel line routing as well as the Olds is slightly different. Exhaust will also be different right off of the manifolds. Your current TH200 trans may have a universal bellhousing so it may bolt right up to your engine. It's up to you to determine how long it will live with the increased power.
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12-22-2002, 02:31 AM
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Doublevision, Post or E-Mail me those rear end codes if you can. As far as torque. I'm hopeing to get about 400 lbs of torque plus. Thats way the Th 400 question
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12-22-2002, 11:50 AM
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allrighty, will take care of the rear codes ASAP. The fuel pump on the 307 is on the same side as the chevy, so you won`t run into any problems there, but as far as the a/c, exhaust and other accessories go, they will be different, also keep in mind the cruise control won`t swap over. the fan shroud will work, but as for the clutch fan I used a older thermal clutch fan that was slightly smaller with more blades. 400 ft pounds of torque will gut a 7.5 rear, if the car ever hooks one good time with slicks via a drag strip it`s over. so if you intend on seeing any strip action, you may want to consider a beefier rear. you`ll also need the correct speedometer gears for the differently geared rear.
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12-22-2002, 11:52 AM
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Year Code Ratio
1982 2JR 3.42:1 1982 2JY 3.08:1 1982 2JZ 3.23:1 1982 2PZ 3.23:1 1982 2PY 3.08:1 1983 4JQ/5JQ 3.73:1 1983 4JR/5JR 3.42:1 1983 4JY/5JY 3.08:1 1983 4JZ/5JZ 3.23:1 1983 4PQ/5PQ 3.73:1 1983 4PY/5PY 3.08:1 1983 4PZ/5PZ 3.23:1 1984 6EF 3.42:1 1984 6EP 3.42:1 1984 6JQ 3.73:1 1984 6JR 3.42:1 1984 6JY 3.08:1 1984 6JZ 3.23:1 1984 6PQ 3.73:1 1984 6PY 3.08:1 1984 6PZ 3.23:1 1985 8JP 3.08:1 1985 8JQ 3.23:1 1985 8PP 3.08:1 1985 8PQ 3.23:1 1985 8PR 3.42:1 1985 8PS 3.73:1 1986 2H5 3.73:1 1986 2HT 2.73:1 1986 2HV 2.73:1 1986 2HY 3.23:1 1987 2HQ 3.23:1 1987 4HF 3.08:1 1987 4HY 3.23:1 The code is on the passengers front side of the rear. [ December 22, 2002: Message edited by: DoubleVision ]</p>
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