Send me an email to my home email
abc7@telus.netI'll send back to you a specification sheet for you to fill out(honestly of course). Prior to retirement, I worked for a converter company and this was the sheet we used to select the proper converter for a customers needs. Sometimes an off the shelf unit was used, sometimes a custom built unit was needed. It all depended on the customers setup.
Give this to whomever you order your converter from and they will be able to supply you a converter
with a stall speed that will match your engine/diff ratio/tire size combination.
Converters are made to fit. Fitting a 8" converter or a 12" converter to your flex plate is not an issue, as the mounting is made to fit the flex plate. Chrysler used both 11" and 12" converters in everything.
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12" converters and 11" converters were both used behind 360 engines.
Don't let price be your only guide in buying a converter. I've seen the insides of a lot of high stalls, and believe me there is a reason why some brands of converters are lower priced.
Whatever you do, avoid used converters as you never can tell what they are like inside or what they will do behind your engine. At a swap meet, I saw a guy trying to sell what he said was a 3500 stall converter for a GM transmission. It was one of ours and the part number on it was 35-12SS, which we made for GM TH350 transmissions. We designed it to stall about 300-500 RPM over a stock unit. The stock GM TH350 converter stalls at around 1400 RPM.