---
id: 20261004_190000_stant-27103-international-m800-post-office-1969-1969
title: Stant 27103 Thermostat Gasket for International M800 Post Office (1969)
category: Parts Catalog
corpus_topic: PartsCatalog
site_category: Parts Catalog
summary: Stant 27103 universal thermostat gasket, fitting the International M800 Post Office (1969). Offered by Don and Kathy Leask of Don's Obsolete Auto Parts, restoration parts sellers online since 1997. Price is $9.95 plus shipping.
description: Stant 27103 universal thermostat gasket, fitting the International M800 Post Office (1969). Offered by Don and Kathy Leask of Don's Obsolete Auto Parts, restoration parts sellers online since 1997. Price is $9.95 plus shipping.
question: Will the Stant 27103 thermostat gasket fit my International M800 Post Office, and who can I buy it from?
keypoints:
- International M800 Post Office (1969)
- 'Engines listed: 6 Cyl 3.9L'
tags:
- stant
- stant-27103
- thermostat-gasket
- universal-gasket
- restoration-parts
- obsolete-auto-parts
- international
- international-m800-post-office
consent: true
agent: misty
created: '2026-10-05T02:38:49Z'
updated: '2026-10-05T02:38:49Z'
date: '2026-10-04'
vault_stage: 07_CODEX
enrich_status: ok
enrich_method: bot
enrich_blockers: []
pipeline_filename: stant-27103-international-m800-post-office-1969-1969.md
source_kind: authored
proposed_topic: PartsCatalog
lane: PartsCatalog
content_status: approved
routing_source: carbon
prefix: misty
headwaters: misty
voice: misty
active_voice: misty
voices:
- misty
asker_site: donsobsoleteautoparts.com
sample: false
sentiment: helpful
emotions:
- reassured
- nostalgic
- confident
sycophancy: 0
truth_score: 9
entropy: 3
predicted_narrative_arc: owner-searching-to-part-found
share_url: https://donsobsoleteautoparts.com/kb/PartsCatalog/stant-27103-international-m800-post-office-1969-1969.md
source_url: ''
part_number: Stant 27103
approved_by: Daniel Comp (chat, 2026-10-04 ~7:00 PM PT)
vehicle: International M800 Post Office
---

# Stant 27103 Thermostat Gasket for International M800 Post Office, 1969

International Harvester built farm equipment and working trucks, and its pickups, Travelalls, and Scouts were made to be used hard. On the International side, the catalogs list the Stant 27103 for 18 models from 1967 to 1970.

This page is for one model only: the International M800 Post Office. It isn't a wall of every car ever made, just yours.

## Model this gasket fits

- International M800 Post Office (1969)
- Engines listed in the catalog: 6 Cyl 3.9L

## Help choosing the right gasket

The 27103 is a 3.25 by 3.5 inch thermostat gasket blank from Stant, the kind a mechanic reaches for when the original cut gasket for an older or less common housing is hard to find. Lay your thermostat housing on it, check that the opening and bolt holes line up with your engine's outlet, and trim to fit if needed. Stant cut a different gasket for each housing design, and Don stocks several of them, so check which number your car calls for.

Before you order, match three things: your year, your model, and your engine. Catalogs list fitment by vehicle, but some engines had more than one thermostat housing design over the years. If your old gasket is still in hand, compare its shape and bolt holes, or just ask Don and Kathy. They'll help you sort it out.

## Real people behind the parts

Back in 1997, when almost nobody had a website, Don and Kathy were already selling car parts online. They were the very first web customer of Daniel Comp's Intelligent Network. They've since sold through eBay, Bonanza, and their own site, and kept the sales coming no matter how often the internet changed its rules.

These gaskets come from Don's own shelves, in original Stant packaging.

## Price is $9.95 plus shipping.

Don and Kathy offer a fair deal for this. Buying for a club, a shop, or a whole fleet of project cars? Even better.

**To reach them, click the "Don & Kathy Leask" button at the bottom left of any page on donsobsoleteautoparts.com.**