T-28 from a dsm... or maybe a 16g. The motors have a 8.5:1 compression. I would at the very least buy: MLS headgasket, arp head studs, injectors, and a tune. Otherwise, you'll boost maybe 3-5psi and fuel cut. In that case, don't waste your time.

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1985 335i
Black on Black coupe 5spd
Tokico lowering springs, KYB struts and shocks, BavAuto strut bars, SPC adjustable camber plates, Ireland Engineering rear toe and camber kit, Sparco buckets, Rota Torque 16x7 fronts 17x9.5 rear, Hella headlamps with HID conversion, all red taillights, MSD coil,M30B35 swap

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M20B27 for sale in Cincinnati