Gary Lewis Posted January 30, 2020 Share Posted January 30, 2020 I think I am going to have to maybe have number dummy or someone pull the numbers because there are from what I can tell 4 versions of the EFI block and two versions of the carbed block. Im curious what the difference is. This was a time when Ford was constantly modifying things. Could be that version B had a few engineering modifications over A that affected compression or economy etc. This shows all I can tell you about the blocks for the 300 as all I know is what I read in the MPC. But note that there are no casting numbers. Oops, posted too quickly. You can look up the calibration codes here: Calibration Info & Part #'s. EDIT: I forgot the very last snip. It is there now. Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 30, 2020 Share Posted January 30, 2020 This shows all I can tell you about the blocks for the 300 as all I know is what I read in the MPC. But note that there are no casting numbers. Oops, posted too quickly. You can look up the calibration codes here: Calibration Info & Part #'s. EDIT: I forgot the very last snip. It is there now. Don't miss the edit. I'd forgotten the crucial snippet on the bottom. Link to comment Share on other sites More sharing options...
1986F150Six Posted February 3, 2020 Share Posted February 3, 2020 Don't miss the edit. I'd forgotten the crucial snippet on the bottom. This was listed in the Fordsix Performance Forum... The cam bearing housing bore on the Ford 300 engines manufactured after June 4th, 1985 was changed to make production installation quicker. Previously all four housing bores measured 2.1440. The late style block with the casting number E1TE-6015AA, has the following cam bearing housing bore dimensions: Location Part # Bore Diameter 1 E5TZ-6261A 2.1590 2 E5TZ-6262A 2.1440 3 E5TZ-6262A 2.1440 4 E5TZ-6261A 2.1590 There are two main thrust bearings. A 3.567" OD flange and 3.602" OD bearing flange. The 1987 and later EFI blocks have the boss with the two bolt holes for the fuel pump but the hole for the pump arm is closed. It can be opened for a mechanical fuel pump. Link to comment Share on other sites More sharing options...
Danny G Posted February 3, 2020 Author Share Posted February 3, 2020 This was listed in the Fordsix Performance Forum... The cam bearing housing bore on the Ford 300 engines manufactured after June 4th, 1985 was changed to make production installation quicker. Previously all four housing bores measured 2.1440. The late style block with the casting number E1TE-6015AA, has the following cam bearing housing bore dimensions: Location Part # Bore Diameter 1 E5TZ-6261A 2.1590 2 E5TZ-6262A 2.1440 3 E5TZ-6262A 2.1440 4 E5TZ-6261A 2.1590 There are two main thrust bearings. A 3.567" OD flange and 3.602" OD bearing flange. The 1987 and later EFI blocks have the boss with the two bolt holes for the fuel pump but the hole for the pump arm is closed. It can be opened for a mechanical fuel pump. good info Link to comment Share on other sites More sharing options...
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