Asa division, Pontiac had only developed a single V8 engine, and the 301 was the smallest variant of the line. The 301’s bloodline could be traced all the way back
The1.66-inch exhaust-valve size in the 6X heads is not the restriction in those engines- it's the exhaust system. Porting the 6X head will still realize a gain in performance, but it's not asPontiacGrand Prix models. FR 3A cm3/231.3 cuin 115 PS 113 bhp 84 kW. 1979 Pontiac Grand Prix SJ. 2 door fixed-head coupé FR 3A 4942 cm3/301.6 cuin 150 PS 148 bhp 110 kW 1527 kg. 1979 Pontiac Grand Prix SJ. 2 door fixed-head coupé FR 4M 4942 cm3/301.6 cuin 150 PS 148 bhp 110 kW. Hereand now, in 1979, there is no tomorrow for the big-engined Trans Am. For the 400 T/A Pontiac engine, this is the last year. The likes of the mighty Trans Am, as we've known it, won't be seen 1979Pontiac Grand Prix SJ - full technical specs sheet, including performance data, economy and emissions, dimensions, weight and engine particulars. Its 4.9 litre engine is a naturally aspirated, overhead valve, 8 cylinder unit that produces 148 bhp (150 PS/110 kW) of power at 4000 rpm, and maximum torque of 325 N·m (240 lb·ft/33.1 kgm u8kVc4Z.