does anyone have use the Holley forward Bias Engine Mounts on a 64 cutlass in combination with the Speed Engineering Long Tube headers?

what about the fitment ?

i have a 1964 Oldsmobile cutlass and just bought a set of aftermarket headers ebay brand that do not fit at all. it is a LS3 with 4l60 e Transmission and Holley forward Bias Engine mounts

would appreciate any reccomandations.

 

I unfortunately don't have a 64, but with forward bias style swap mounts my speed engineering headers clear on a 72. Only issue is they tuck up so tight to the floor board I had to get a Holley/hooker crossmember to clear the exhaust. Better than hanging low and looking like trash though.

#3 plug wire boot just touched the primary with a 45* boot. I shaved a small amount of the boot to clear it 1/8". The style I had was overly thick. Msd 44* would probably be fine.