LT-1 Intake Bolts

[Roger S.]

What are the correct bolts (size/length/head pattern) used to install the aluminim intake manifold for a '70 LT-1. Yes, it does have the engine pull bracket. JG says no washers but nothing about type/pattern of bolts. Thanks much. Roger

[Terry M.]

Re: LT-1 Intake Bolts *TL*

Roger,

These are what mine are. Someone elses may be different. I can't tell you diameter, thread count (although I could guess), or length because I've never had them out.

LT1 intake manifold bolts
Odd numbers are drivers side Even numbers are passenger side
Numbers begin at the front of the car.

#1 three lines RSC #2 three lines N inside a circle
#3 three lines N inside a circle #4 three lines M
#5 three lines RSC #6 three lines M
#7 three lines C #8 Stud TCS
#9 three lines C #10 three lines C
#11 three lines C #12 three lines RSC

Good luck.

[John H.]

Re: LT-1 Intake Bolts

They're 3/8"-16 x 1-1/8", with 1-3/8" where the lift brackets go; don't use bolts longer than 1-1/4" at the non-bracket locations, or they can interfere with some of the pushrods. Use thread sealer on them so oil doesn't migrate up the threads from the lifter valley and appear as stains around the bolt heads.

[Roger S.]

Re: LT-1 Intake Bolts

thanks for the info guys.