Does anyone make any trick performance cylinder heads for any chevy inlines (aluminum, 4 valve, etc)?

It really depends on what type of GM engine you are referring to...an overhead valve or an overhead cam. Can you be more specific or perhaps tell us about your application (drag strip, circle track, road race, street, etc). There are several manufacturers of performance heads for an overhead valve 4 cylinder...Deppe Engineering, Fontana. You can use most any small block V-8 head, including the 4 valve per cylinder ARAO head, if you use a Kansas Racing Products 4 cylinder block. Best regards, Gerry

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Sorry about that. I was originally thinking about inline, 6 cylinder,OHV chevy engines, old 216 or new 250 types, . I'm looking to possibly squeeze one into an MGB based kit car.

DNK

Old 216/235 - Wayne, Howard, etc 12 Ports, rare & expensive.

New 250 - Sissell (Mike Kirby) race only, alloy SBC design - also big $$