These engines are actually GMCs 'small block' that came in trucks from 1939 to 1962, they came in 228", 236", 248", 256", 248", and 302". The 302" came out in about 1952 and was used in larger trucks, busses, and military vehicles. The GMC and the Chevy 'Stovebolt' six from 1937 to 1962, in 216", 235", and 261", especially with the Wayne 12 Port Head (or variations) is what the Inliners International was origianally founded on.
There are many , mostly vintage, performance parts still available tho' they tend to be pricey and harder to find than the later model sixes which have a completely different layout. Check your swap meets, eBay, and our 12 Port Advertisers and Classifieds.
The biggest following of the early engines now seems to be the folks who ran them 'back in the day' and the vintage classes at Bonneville and El mirage. They still hold their own, among them are the Fergusons who ran 300mph with a 302" based engine in their streamliner, JD Tone has a record over 200mph in a roadster, Doug Robinson who has many records, and there are several other Inliners who compete annually with these vintage engines at the Salt.
Tim
