1978 monte engine possibilities

65

Asked by Oct 21, 2009 at 11:49 PM about the 1978 Chevrolet Monte Carlo

Question type: Car Customization

i know this is a pretty broad question but does anybody know what the biggest motor i could place in my 1978 monte carlo. i know that a 454 will drop into it but i was looking for something a bit bigger, i.e. a 502/572. BTW it's gonna be a drag car. thanks for any help.

8 Answers

15

pretty much any big block will drop in there. they are pretty big under the hood. just as long as you get rid of the air box, i think you will be in the clear.

65

ok thanks do you know if i need to make any changes to the front end or suspension. i've had people tell me not to worry about it but i've had other people tell me hat if i just drop a big block in with the stock suspension it'll bust the shocks and possibly the a arms will break.

105

Anytime your dropping a different motor into something it's never a bad idea to upgrade the suspension.If your building a drag car then i would certainly swap out the stock suspension for something stonger. As for the motor size the 572 will fit with some mods to the inner fender walls,but as a drag car your only losing weight in the front you don't need anyway.Good luck on your build.

65

ok well i got most of the "unnecessary" crap out of the way and i found an LS-6 for cheap that i'm gonna convert to a carb. motor but im kinda iffy on what is the best way to get rid of the airbox. it's gonna be a street car and im not running a/c or heat into the cabin so should i just cut it out and weld in a piece of plate steel or what. i've had a couple people tell me just to put some 1/2" sealed plywood over the gap, bolt that in and put some dyno-mat over it overlapping the edges by an inch and a half or so but that doesn't really seem to be that great of an idea.

15

I jsut un screwed the air box ( and used a hammer) to get it out. Then i jsut cut a 1/8 inch piece of sheet metal to the size of the hole and screwed it on with sealant around the edges. Worked great.

65

ok cool. i'll give that a try once the snow melts ang i can actually work on the car again. lol.

15

i put a 396 in my monte i didnt even move the motor mounts just droped it right in i put new shocks but you cant put regular headers you have to have hooker comps i have a 84 monte

13,125

Does size matter? Small blocks like the LS-6 can be made to put out a lot of HP and T. The 572 should be big enough and there are ways to hit 1200 HP if that is what you want. You will need a complete new suspension and drive train, brakes, insurance, parachute, and a large gas tank.

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