Have a good 59AB short block and a pair of NOS 41T heads. Any reasons I should not bolt these together to make a complete motor? The Van Pelt website shows 41T as a truck motor 85/90 hp 1938 to 42. 59AB's are 90/100 hp 1946 to 48. The combustion chamber appears to be the same. Any advice?? Thanks
Clay them to make sure you have the valve clearence. We're only talking 5 hp. no need to spend a bunch of money.
The earlier heads are from a 221 ci (3.0625 bore) engine. The 59 block is 239 ci (3.1875 bore). I don't think it will matter much, but I would double (triple) check the chamber area and volume. Use head gaskets for the 59 engine.
Pretty sure the valve angles for the earlier block the heads came off of were different than the 59 block. Ford had a cutter for relieving these heads to use with the 59 series block when blocks were changed at dealeships. Prolly need to check closely the area at the top of the valves on p***enger side head before ***embly.
Odd parts...those are postwar made replacement heads (never used in production) for prewar 221 truck engines. CC's probably pretty much same as 59 heads. Prewar heads have a clearance problem at top edges of valves when used on 59A blocks; books leave it unclear whether these 41T heads have needed clearance cast in or not, as many were probably used with postwar model 41 replacement blocks, so check clearance carefullu at top edge. Problem if it exists is minor, requiring only minor grinding.
I bought one of those cutters on the 'bay simply because it looked interesting, was cheap and was a flathead related tool. Now I know what it is for. Thanks guys.
It'll be interesting to see if these heads need the chamber cut...they are for prewar applications, but were made postwar and were likely used with the matching 41A replacement block, which had postwar valve angles though it was made for prewar replacement...I'm betting the chambers are actually postwar pattern! The 4 in 41 is for 1944, probably the design date.
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