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Old 01-31-2017, 10:16 PM   #1
1966chevyc20
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Crate Engine options for 1966 c20

Hi, I have a 1966 chevy c20. Removed the tired old 283 and am looking at crate engines. Originally I was interested in the goodwrench 195 hp version, but after more research i stumbled upon the L31 crate engine. For about $500 more i think a roller cam and better heads is a better deal than the 195hp setup. Now for questions;
Will my SM420 bolt up to the L31 as far as bell housing bolts?
Will I need a different flywheel? Clutch?
Does the L31 have a tapped hole for the clutch linkage/z-bar pivot ball?

Besides that I know I would need a different intake, melonized distributor gear, and an electric fuel pump. Any help would be appreciated. Thanks
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Old 01-31-2017, 11:17 PM   #2
chevy_mike
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Re: Crate Engine options for 1966 c20

Yes, the bell housing is the same.

You will need a new flywheel as you need one for a one piece rear main seal. Clutch will depend on what flywheel you get and if it will have the same pattern.

Not sure on the clutch linkage bolt hole.
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Old 02-01-2017, 01:52 AM   #3
Captainfab
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Re: Crate Engine options for 1966 c20

I don't know about the crate L31 but the regular production L31's do have the bellcrank stud boss drilled and tapped. At least all the ones I have do.

I would definitely go with the L31 crate engine if it is within your budget.
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Old 02-01-2017, 07:49 AM   #4
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Re: Crate Engine options for 1966 c20

You are going to need an intake for the vortec heads, the correct distributor gear for the roller cam, a plug for the hole in the timing cover from the crank sensor and an electric fuel pump. I have one in my 66 with a mild cam and it really does run well. We swapped the cam to one that was more of a carb grind.
Jimmy
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