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What would it take to modify an olds cutlass supreme

Customer Question
What would it take...

What would it take to modify an olds cutlass supreme brougham with a 307 engine to a 350 engine? what would i need to modify it to a 350? would it be cheaper to punch it out or,replace it with a 350?

Mechanic's Assistant: How many miles are on the car? Is it an automatic or a manual transmission?

59k miles. r2 automatic.

Mechanic's Assistant: What year is your Cutlass Supreme?

1986 brougham

Mechanic's Assistant: Are you fixing your Cutlass Supreme yourself? What have you tried so far?

I need additional power by converting the engine thats in it if its cheaper. I havent tried anything yet.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Would it be cheaper to modify the 307 or just buy an okds 350 engine?

Submitted: 11 months ago.Category: Oldsmobile
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Answered in 2 minutes by:
9/18/2017
Oldsmobile Mechanic: KALAMYKID, Shop Owner/ Tech replied 11 months ago
KALAMYKID
KALAMYKID, Shop Owner/ Tech
Category: Oldsmobile
Satisfied Customers: 5,593
Experience: I HAVE OWNED MY OWN SHOP FOR OVER THREE YEARS. I HAVE THE TOOLS AND SOFTWARE TO ANSWERE ALMOST ANY Q
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Are you looking to use an olds 350, or a chevy 350?

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Customer reply replied 11 months ago
WHICH WOULD BE OF LESS COST? cOULD I GET AWAY WITH MODIFYING THE 307 TO A 350 OR, REPLACING IT WITH AN OLDS 350?
Oldsmobile Mechanic: KALAMYKID, Shop Owner/ Tech replied 11 months ago

Swapping the 307 for the olds 350 would be your best choice. The olds 350 will bolt right in and connect to the transmission with no problems. The only thing you would have to have will be the brackets for the alternator, power steering pump and ac compressor. The original wire harness for the 307 will connect right up to the 350, but you may have to move the wires around a little bit for the alternator. If it was mine, I would go with the olds 350.

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Oldsmobile Mechanic: KALAMYKID, Shop Owner/ Tech replied 10 months ago

Just wanted to check in with you and see how it was going?

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