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It should fit fine. The 455 will be tight fit with ac. I have a 71 Pontiac 350 Catalina engine in a 80 Pontiac grand prix with everything hooked up except smog pump. Lots of room left.
Yes it will fit, There were no 455s produced in 1968. The largest Pontiac V8 that year was the 428. 455,428,421,400,389,370,347,326,317,287 and 350 Pontiac motors are all physically about the same external dimensions. The is no "small" or "big" block Pontiac V8 except for the 1977-1981 265/301 which were the same legnth as earlier V8s, but had a 1" shorter deck height. The only potential problems you may have are changing motor mounts (pre 1970 blocks only have 2 mount bolts per side), wiring issues (starter on wrong side if a Chevy originally), and if the car was originally equipped with a Chevy engine the transmission will not bolt up, as Buick,olds,Pontiac use the same bellhousing, Chevy has a different pattern.
What else can I help you with?
What is the firing order for a 1978 Pontiac Grand Am 301 motor 4.9L?
1-8-4-3-6-5-7-2 distributor rotates counterclock wise.
Where is the starter located in a 1978 Pontiac Grand Prix?
the starter is located on the passenger side of engine bay. it is down towards the bottom .
What is the oil capacity of a 1978 Trans Am?
The 1978 Pontiac Firebird Trans Am engine oil capacity is five quarts. The 305, 350, and the 454 cubic inch motors all had the same motor oil capacity.
How do you get to the AC and heater fan motor on an AC car 1978 Pontiac TransAm Firebird?
factory recommendation is to cut a hole in the inner fender well to access/replace it.
What windshield washer tanks fit in an 1981 caballero?
Any windshield washer tank from a GM A/G body would work - Chevy El Camino (1978-87), Malibu (1978-83), Monte Carlo (1978-88), Buick Century (1978-81), Regal (1978-87), Olds Cutlass Supreme (1978-88), Pontiac Grand Prix (1978-87)
When was Grand Arrival created?
Grand Arrival was created in 1978.
What actors and actresses appeared in Water Motor - 1978?
The cast of Water Motor - 1978 includes: Trisha Brown
Can a 1968 Chevy trucks 350 fit in an 1978 Chevy truck?
yes, the motor will interchange no problem. on the 68 engine it may have less pollution control system then the 78 is all
Do yo have t tops for 82 Pontiac grand prix are there any t tops ats interchangeable?
All T-tops from a GM A body (1978-81)/G body (1982-1987) are interchangeable
Where are the front speakers located on a 1978 Pontiac Trans Am?
Center of the dash.
When was Portland Grand Prix created?
Portland Grand Prix was created in 1978.
When was Grand Sierra Resort created?
Grand Sierra Resort was created in 1978.
