{"product_id":"liriuda-rochester-quadrajet-1901r-4-barrel-carburetor-for-chevy-327-350-427-750-cfm-manual-divorced-choke","title":"liriuda Rochester Quadrajet 1901R 4‑Barrel Carburetor for Chevy 327\/350\/427 — 750 CFM, Manual Divorced Choke","description":"\u003cstrong\u003eHigh-flow liriuda Rochester Quadrajet 1901R 4-barrel carburetor — a direct-fit replacement for many 1966–1973 Chevrolet V8 engines that restores throttle response and tunability.\u003c\/strong\u003e\n\n\u003cp\u003eIf you're rebuilding a classic Chevy or upgrading an older V8, this liriuda Rochester Quadrajet 4MV carburetor provides a ready-to-install spread-bore solution compatible with small- and big-block Chevy engines from the late 1960s through early 1970s. Supplied complete with flange and air filter gaskets, jets, plugs and a tool for inserting plugs, the unit mirrors the original 4-barrel design used on numerous Chevy and GMC cars and trucks. It arrives with a manual divorced choke and vacuum secondaries and supports tuning across a 600–750 CFM range depending on setup.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and years will this carburetor fit?\u003c\/h3\u003e\n\u003cp\u003eThis Rochester Quadrajet 1901R\/1901-GG replacement fits a wide range of Chevy and GMC V8s used from the mid-1960s into the early 1970s, including popular small- and big-block displacements. Confirm your intake flange and throttle linkage match the spread-bore mounting pattern before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmall blocks: 327, 350, 400 (1966–1973 coverage varies by displacement)\u003c\/li\u003e\n  \u003cli\u003eBig blocks: 396, 402, 427, 454 (common 1966–1973 fitments)\u003c\/li\u003e\n  \u003cli\u003eAlso referenced for some Corvette applications and GM replacement part numbers 1901R \/ 1901-GG\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the Quadrajet design affect driveability and fuel economy?\u003c\/h3\u003e\n\u003cp\u003eThe Quadrajet uses small primaries and larger secondaries to balance low-speed throttle response with high-flow capability when demanded. That unequal bore arrangement yields better part-throttle behavior while still allowing ample airflow for harder acceleration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmaller primary venturis improve idle stability and off-idle throttle feel\u003c\/li\u003e\n  \u003cli\u003eVacuum-actuated secondaries open smoothly under load for predictable power delivery\u003c\/li\u003e\n  \u003cli\u003eTriple-venturi central float helps maintain consistent fuel control during cornering or acceleration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat hardware and tuning parts are included, and what adjustments might I need?\u003c\/h3\u003e\n\u003cp\u003eThe carburetor ships with common gaskets, extra jets and plugs to permit initial tuning; however, you should plan on final mixture, idle and float adjustments after installation. Installation instructions are not included, so mechanics often follow service manuals or walkthrough videos when setting up the unit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded: carburetor, flange gasket, air filter gasket, plug-pushing tool, 4 plugs, 8 jets\u003c\/li\u003e\n  \u003cli\u003eCommon adjustments: idle mixture, float level, secondary vacuum calibration\u003c\/li\u003e\n  \u003cli\u003eRecommended fuel pressure: ~5–5.5 psi; add regulator if pump pressure exceeds 7 psi\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this a direct replacement and what should I check before buying?\u003c\/h3\u003e\n\u003cp\u003eYes — this liriuda Quadrajet is built to bolt onto original spread-bore GM intake manifolds as a direct replacement for compatible models. Before purchase, verify your vehicle’s original carburetor part number and that your throttle linkage, choke style and mounting pattern match a 1901R\/1901-GG style unit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm original part number or compare flange pattern with product photos\u003c\/li\u003e\n  \u003cli\u003eCheck choke type: this unit uses a manual divorced choke with vacuum secondaries\u003c\/li\u003e\n  \u003cli\u003eConsider jet selection included for basic tuning or custom tuning needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Classic Chevy and GMC owners, restorers and performance hobbyists who need a cost-effective, period-correct replacement for 4-barrel Rochester Quadrajet applications. Suitable for engines from 327 through 454 where a spread-bore Quadrajet is the intended carburetor, and ideal if you want a mostly complete kit to simplify installation and initial tuning. If you are unsure about compatibility, contact liriuda or consult a mechanic before purchase to ensure the carburetor meets your intake manifold and linkage requirements.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this carburetor fit my 1970 Chevy 350?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, this liriuda Quadrajet 1901R fits many 1970 Chevy 350 small-block applications; verify your intake flange and original carburetor pattern first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need a fuel pressure regulator with this carb?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Recommended if your pump pressure exceeds 7 psi; ideal operating pressure is about 5–5.5 psi for best performance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"liriuda","offers":[{"title":"Default Title","offer_id":48079969484958,"sku":"B09FP8R2H8","price":255.32,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/liriuda-quadrajet-front-view.jpg?v=1785777569","url":"https:\/\/northtrailauto.ca\/products\/liriuda-rochester-quadrajet-1901r-4-barrel-carburetor-for-chevy-327-350-427-750-cfm-manual-divorced-choke","provider":"North Trail Auto","version":"1.0","type":"link"}