I have accel 566 plugs what is compatable?

It is possible to upgrade a 1987 Chevy 350 engine to a serpentine belt assembly using parts from a 1994 Chevy small block engine. However, there are some differences between the two engines that may affect compatibility.
One major difference between the two engines is the placement of the alternator. On the 1987 engine, the alternator is typically mounted on the driver's side of the engine. On the 1994 engine, the alternator is typically mounted on the passenger's side of the engine. This means that the brackets and pulleys for the serpentine belt assembly may be different between the two engines.
Another factor to consider is the number of pulleys on the serpentine belt assembly. Some 1994 small block engines were equipped with additional accessories, such as air conditioning or power steering, that require extra pulleys. If your 1987 engine does not have these accessories, you may need to modify the serpentine belt assembly to remove the extra pulleys.
To ensure that the serpentine belt assembly from the 1994 engine will fit your 1987 engine, it is recommended that you compare the parts and brackets from both engines side by side to identify any differences.

You will have to look for yourself with this picture. I don't think that'll fit example:
1-valve cover.
2-engine oil pan seals and gasket.
3-The rear block for the transmission.
4 Engine support bracket.
There are so many differences.





Hope it helps. Good luck have fun.

T_330_81_1981_Chevrolet_Light_Duty_Truck_10_to_30_Service_Manual
http://www.73-87chevytrucks.com/techinfo/7387CKMans//Service/ST_330_81_1981_Chevrolet_Light_Duty_Truck_10_to_30_Service_Manual.pdf

GMC Workshop Manuals

PDF]1980 service manual - 73-87ChevyTrucks.com. Classic ...

www.73-87chevytrucks.com/.../ST_330_80_1980_Chevrolet_Light_Tru...

Wiring diagrams for 1980 trucks are contained in a separate Wiring. Diagram Booklet.... Some of these service operations require the use of tools specially designed .... 1-1/2 Ton. 2-3/4 Ton. 3-1 Ton. 4-1/2 Ton (W/HDSusp). Fig. 0A-3-Vehicle Identification Number ... Right Hand Side of Cylinder Block at Rear of Distributor.

HEI Distributor Pickup Coil Test - YouTube

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Complete 73-87 Wiring Diagrams - 73-87chevytrucks.comforum.73-87chevytrucks.com/smforum/index.php?topic=11766.0Apr 8, 2009 - 1 post - ‎1 authorHere are the complete wiring harness schematics for the 73-87 series. These are HUGE jpgs so you may want to save and print them off.[PDF]1980 Chevy - 73-87ChevyTrucks.com. Classic Chevy ...www.73-87chevytrucks.com/.../ST_330_80_1980_Chevrolet_Light_Tru...1980 Chevrolet Passenger Car and Light Duty Truck Unit Repair (Overhaul). Manual.Wiring diagrams for 1980 trucks are contained in a separate Wiring. Diagram Booklet...... 8-Cylinder Gasoline Engine Code is (305, 350, 400. CID) Located ...

Here, is what I think you are asking. The TBI intake from a 91 will fit the same size engine from 88 to 95. The Vortec didn't come out till 96 I believe. So if your 91 is the original engine then it is not a Vortec motor. If you want to swap your 5.7 with another 5.7 (5.7 = 350) Then the 88-95 should work, Just double check your sensors and locations as the plugs may be different and or in different locations. I know my 88 GMC and my 94 chevy (both K1500's) were a little different. Hope this helps.

From this chart - I think you may be misreading the number - 3970010 is possibly the actual number: Which makes the engine pretty old 68-72 350 V8 - 4 bolt main. I included past this number so that you can see that the number you posted doesn't actually exist. And thus my conclusion that the 9 is most likely a 0. Hope this helps. 3970010 350 69 Corvette late 69,4 bolt main 3970010 302 69 Camaro Z/28,Late 69, 4 bolt main 3970010 350 69-79 Truck 2&4 bolt main 3970010 350 69-79 Pass,Chevelle,Camaro,Nova,MonteCarlo 2&4 bolt main 3970010 350 70 Corvette 300,350,370 HP 4 bolt main 3970010 350 71 Corvette 270,330 HP 4 bolt main 3970010 350 72 Corvette 200,255 HP 4 bolt main 3970014 350 69-77 Pass,Chevelle,Camaro, Nova,MonteCarlo 2 or 4 bolt main 3970014 350 69-79 Truck 2 or 4 bolt main 3970014 350 72 Corvette late &undefined;72,200 HP,255HP 4 bolt main 3970020 307 68-73 Pass,Chevelle,Camro, Nova 3970020 307 69-73 Truck 3970024 307 69-73 Pass,Chevelle,Camro, Nova,Truck 3992386 327 68-69 Pass,Chevelle,Camro, Nova,Truck Large Jounal

Back to old school....


Find 1st cylinder.. Remove the plug and bring it to TDC

Check your timing belt.. for TDC

The 1995 350 is a "Vortec 5.7" motor if I remember correctly.You will have to get a throttle body and intake manifold for an older 5.7 liter(early 90's?).The Vortec engines are a sequential multiport injection setup(totally different).

Have you looked down inside the engine were the dist. goes ? If you do you will see the oil pump drive shaft . You will notice a slot cut in it , now look at the bottom of the dist. shaft . You will see a key or it looks like a standered screw driver . Probably not linning up , need to take a long screw driver an turn the oil pump shaft till they do .