Answer
Sure. You need to replace the barrel, stock, sideplate assembly, trigger guard assembly and add the stock hardware from the Glenfield Model 70. Estimate around $150 or so.
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In other words, it's much cheaper just to buy or trade for a clip-fed model if you prefer that type of cartridge feed mechanism. Oh, and that inline magazine that everyone calls a "clip" isn't a clip, technically. It a magazine. Mausers use "charger" clips. Mannlichers and M1 Garands use "en-bloc" clips. Some highly technical people get extremely bent if someone asks for "clips" when they actually mean magazines. Lol.
Marlin makes 7 and 10 round magazines. Aftermarket companies like Ram-Line makes 20, 25, and 30 round magazines for the Marlin/Glenfield.