Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Shop Wilcap At Speedway Motors

Wilcap Co., manufacturer of vintage engine adapters and transmission adapters, has been building some of the best speed and power equipment in the industry for over 60 years. From their Pismo Beach, CA facility, Wilcap continues to produce the finest quality automatic and manual transmission adaptors for vintage hot rod engines.

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  • Wilcap 303-EFM Early Olds-Caddy to Early Ford Transmission
    Wilcap 303-EFM Early Olds-Caddy to Early Ford Transmission
    (Part #91628922)
    x
                This adaptor allows you to put a 1949-64 Olds 303, 324, 371 or 394 or 1949-1953 Cadillac 331 in front of a 1932-48 Ford manual transmission. Includes pilot bearing adapter.
            
  • Wilcap 392-350 Early Hemi to GM TH350 Transmission Adapter
    Wilcap 392-350 Early Hemi to GM TH350 Transmission Adapter
    (Part #91628924)
    x
                This adaptor allows you to put a 1954-58 Chrysler, 1953-58 Dodge or 1952-58 Desoto Hemi engine in front of a Chevy Powerglide, Turbo 350, Turbo 400, 700R4, ect. automatic transmission. Includes adaptor, flexplate and hardware. Works best with starter listed below.
            
  • Wilcap CAD-350 Early Cadillac to Chevy Transmission Adapter
    Wilcap CAD-350 Early Cadillac to Chevy Transmission Adapter
    (Part #91628920)
    x
                This adapter kit allows you to put a Chevy automatic transmission (Powerglide, TH350, TH400, 700R4) behind a 1955-64 Cadillac 331, 364, 390 & 429 engine. For Turbo 350, Turbo 400, or 700R4 transmission application.

    Includes adapter, flexplate and hardware.

    Must be used with starter 910-67482.
  • Early Hemi Oil Filter Bypass Valve
    Early Hemi Oil Filter Bypass Valve
    (Part #91011048)
    x
                

    The oil filter bypass converts your Hemi to a full filtered system and is highly recommended. Designed for 1955-58 Chrysler Hemi.

  • Wilcap FC1 Early Hemi Timing Cover
    Wilcap FC1 Early Hemi Timing Cover
    (Part #91011046)
    x
                These aluminum timing covers clean up the front of your 1955-58 Chrysler or 1953-1957 Dodge Hemi's. Will work with the B/B Chevy water pump conversions.
            
  • Wilcap FA1 Early Hemi Oil Filter Adaptor
    Wilcap FA1 Early Hemi Oil Filter Adaptor
    (Part #91011047)
    x
                

    This adaptor converts that ugly canister oil filter to a spin-on. It mounts in the original location and lays the filter along the oil pan rail. Designed for 1955-58 Chrysler Hemi.

    The FA1 places the filter in a horizontal position and allows for the starter to be placed on the passenger side.  It comes with the gasket and bolts.  In some cases it has been found the oil filter adapter block boss was milled shorter on some blocks so it may be necessary to use the
    smaller oil filter.

    Instructions (PDF)