Any concerns going from 425 to 455 ?
#1
Any concerns going from 425 to 455 ?
I have a 65 Cutlass with a 425 (year ?) and its pretty tired , I have a 455
(1970) that came with the car . I might toss in the 455 and see how it does, anything to be careful of or look out for ?
Seems it would be a straight forward swap ? thanks!
(1970) that came with the car . I might toss in the 455 and see how it does, anything to be careful of or look out for ?
Seems it would be a straight forward swap ? thanks!
#5
The water pump length varies due to A/C or non-A/C. It is not related to year or engine size. Use the pump that matches the brackets and pulleys you plan to use.
#7
Thanks guys , I am pretty sure both engines have pulleys on them .
So I should be able to "drop" in 455 but if nec. steal parts of the 425 ?
I am not worried.
Now the important stuff run headers ?(got em) Run the 2 spd . till it dies?
put in the T350 at the same time ? (not real hot on adding the floor shifter)
Just stuff for me to figure out !
So I should be able to "drop" in 455 but if nec. steal parts of the 425 ?
I am not worried.
Now the important stuff run headers ?(got em) Run the 2 spd . till it dies?
put in the T350 at the same time ? (not real hot on adding the floor shifter)
Just stuff for me to figure out !
#8
The difference in water pump heights is a function of A/C vs. non-A/C. It is not generally related to the year. The pump height is matched with the brackets and pulleys. Use them all as a matched set.
#9
Joe, if you get to NM or NV, I will show you some AC pumps for 66 that are 5.12" high, just like the non-AC pumps. I don't know much about any other years. Since I never use AC pulleys either, I suppose it is possible Olds used 5.62" pumps then but the GMPD parts book doesn't list anything but the 5.12" high pump in 66 (388182 regular, 388183 AC).
#10
Joe, if you get to NM or NV, I will show you some AC pumps for 66 that are 5.12" high, just like the non-AC pumps. I don't know much about any other years. Since I never use AC pulleys either, I suppose it is possible Olds used 5.62" pumps then but the GMPD parts book doesn't list anything but the 5.12" high pump in 66 (388182 regular, 388183 AC).
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